echecs16.info Theory MIL DTL 53072 PDF

MIL DTL 53072 PDF

Sunday, June 23, 2019 admin Comments(0)

MIL-C - Download as PDF File .pdf), Text File .txt) or read online. MIL-DTL CHEMICAL AGENT RESISTANT COATING (CARC) SYSTEM APPLICATION PROCEDURES AND QUALITY CONTROL $ PDF + Print. RENUMBERED AS MIL-DTL Format. Details. Price (USD). PDF Date: September 2, ; Status: Superseded By: Superseded By: MIL-DTL


Author:YULANDA LUCHESSA
Language:English, Spanish, Arabic
Country:Papua New Guinea
Genre:Politics & Laws
Pages:270
Published (Last):06.03.2015
ISBN:734-6-48991-788-3
ePub File Size:19.57 MB
PDF File Size:14.62 MB
Distribution:Free* [*Register to download]
Downloads:36792
Uploaded by: BERNICE

MIL-DTL (Primer, Epoxy Coating, Corrosion Inhibiting .. https://www. echecs16.info or from USAMC. MIL-DTLC, DETAIL SPECIFICATION: CHEMICAL AGENT RESISTANT COATING (CARC) SYSTEM APPLICATION PROCEDURES AND QUALITY CONTROL INSPECTION (06 JUN ) [SUPERSEDING MIL-CB] It is intended for use as a guide in selection of the appropriate materials and procedures, and as a. Buy MIL DTL F CHEMICAL AGENT RESISTANT COATING (CARC) SYSTEM - APPLICATION PROCEDURES AND QUALITY CONTROL INSPECTION.

SCOPE 1. This document covers the general requirements for application and inspection of the chemical agent resistant coating CARC system used on tactical military equipment. It is intended for use as a guide in selection of the appropriate materials and procedures, and as a supplement to information available in the below referenced cleaning, pretreating, and coating specifications. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples.

Thoroughly stir each of the components separately prior to admixing. While slowly pouring component B into component A, continue to stir until the manufacturers specified volume mixing ratio is achieved. Reduction of component A pigmented solution with component B clear solution shall be per manufacturers instructions.

Component B shall always be added to component A, and this procedure shall not be reversed. The temperature of each component shall be 65 to 95 oF before mixing. The reduced primer should be continuously stirred to allow thorough mixing and to counter pigment settling. It should then be strained through a 40 mesh paint filter or equivalent and allowed to stand at room temperature for 30 minutes to allow primer adequate time to induct or follow the manufacturers instructions.

All surfaces to be painted must be thoroughly cleaned as specified in 3. To insure a chemically clean surface, perform the test in 4. Failure to comply with 4. The primer should be sprayed with one full wet coat and needs to dry up to 6 hours dry to touch before applying the topcoat. Time will depend on conditions.

The admixed primer must be used within 8 hours after mixing to insure performance. The dry film thickness should be between 0. The largest factor affecting cure is temperature. The effect of decreasing temperatureo within a facility's painting area will double the cure time for each 18 degree drop in temperature under 70 F. The cure time can be accelerated by a heated atmosphere. The primer furnished under this specification shall be products which are authorized by the qualifying activity for listing on the Qualified Products List QPL see 6.

This specification covers a flash drying, corrosion inhibiting epoxy primer for ferrous and nonferrous metals. It is a two package system consisting of a pigmented epoxy resin part A and a polyamine - epoxy adduct catalyst part B. This primer is intended for use on properly cleaned and pretreated ferrous and nonferrous surfaces. It is an acceptable primer system to use with CARC topcoats and provides a lead and chromate free formulation. The components shall be thoroughly mixed prior to and after admixing.

Mix four parts of part A to one part of part B by volume and stir until well blended. The thinned primer should be thoroughly stirred, strained through a 40 mesh paint filter or equivalent and allowed to stand 30 minutes prior to use and should continue to be stirred throughout the primer application. After completion of the 30 minute induction period, the primer shall be sprayed to a dry film thickness between 1. The primer need only be set to touch before applying the topcoat.

Dtl 53072 pdf mil

The admixed type I primer must be used within 8 hours after catalyzing to insure performance, but type II material must be used within four o hours.

Potlife is shortened at higher temperatures. At 70 F, the dry to touch time is between 15 and 45 minutes. Dry to handle time is 90 minutes to 4 hours depending on the type. The effect of decreasing the temperature within a facility's painting area will double the cure time for each 18 degree drop in temperature under 70 oF.

The primer furnished under the specification shall be products which are authorized by the qualifying activity for listing on the Qualified Products List QPL see 6. This primer is a water reducible, air-drying, corrosion inhibiting epoxy primer. It is a two component system with a pigmented polyamide component A and a clear epoxy component B. The primer is intended for use on pretreated ferrous and nonferrous substrates and is compatible with CARC topcoats.

Thoroughly stir component A until uniform. Mix one volume of component B with three volumes of component A until a smooth homogeneous mixture is achieved. Reduce the admixed primer with deionized water to a spraying viscosity of 18 - 24 seconds in a number 2 Zahn cup. The thinned primer shall be stirred thoroughly, strained through a 40 mesh paint filter or equivalent and allowed to stand for 30 minutes prior to use.

After completion of the 30 minute waiting period, the primer shall be sprayed to a dry film thickness between 1. The primer need only be set to touch FED-STD, method before applying the topcoat, but all water must have evaporated.

Dtl 53072 pdf mil

This is usually between 30 minutes and one hour depending on conditions. The admixed primer must be used within o hours after catalyzing to insure performance. The largest factor 6 affecting cure is temperature. At 70 F, the dry to touch time is 30 to 60 minutes and the dry to handle time about 2 hours.

Due to the fact that the primer is a water-reducible system, a high relative humidity will retard the dry time while a low relative humidity will accelerate the process. Potlife is shortened by temperature increase. The primer furnished under this specification shall be a product that is authorized by the qualifying activity for listing on the Qualified Products List QPL see 6.

Since the sprayed primer contains water, care must be taken to insure the surface is dry to touch before application of polyurethane topcoats. Premature top coating may lead to an undesirable reaction between water evaporating from the primer and the catalyst component of the urethane being applied. The undesirable reaction will produce defects such as blisters, gas bubbles or pinholes in the topcoat film, compromising the CARC properties.

This primer is a waterborne, cathodic electrodeposition, epoxy primer formulated lead and hexavalent chrome free. This primer is intended for use on properly cleaned and pretreated ferrous and nonferrous metal surfaces.

It is formulated lead and chromate free and is compatible with CARC topcoats. Since it is applied with an immersion-type procedure and cured by baking, this primer is designed for a large-scale production process. The manufacturer should provide instructions for mixing and thinning. Prepare the primer bath by mixing resin feed and pigment paste components that have been rinsed and thinned reduced with pure deionized water that is free of bacteria conductivity less than 10 microhms per centimeter.

After mixing components allow bath to be stirred and agitated for a hour period to facilitate thorough mixing and reduction.

After preparation of the bath, allow it to stir for 24 hours prior to use. During the deposition process, the bath must be constantly agitated. Since the primer is applied via cathodic electrodeposition, the substrate to be coated is the negative electrode, while the side electrodes are positive. Coat and cure as recommended by the coating manufacturers instructions.

It also differentiates between systems with barium chromate Class C1 , strontium chromate Class C2 and non-chromate Class N corrosion inhibitors. The primer is intended for use on pretreated nonferrous substrates and is compatible with CARC topcoats.

Type II shall not be used except on aircraft where specifically authorized. The epoxy primer shall be prepared by first thoroughly mixing each of the components separately. Component A is the pigmented base component of epoxy resin solution, and Component B is the curing agent. The two components are then mixedoin the volume ratio specified by the manufacturer. The temperature of each component shall be 65 to 95 F before mixing. Reduce the admixed primer with water according to the manufacturer's recommended procedure using water conforming to type IV of ASTM D Continuously stir the reduced primer throughout the coating application.

MIL-C-53072

After completion of the 30 minute induction period, the primer shall be sprayed with one full wet coat to a dry film thickness between 0. This is usually between 30 minutes and 1 hour depending on conditions. The admixed primer must be used within 4 hours after catalyzing to insure performance.

At 70 oF, the dry to touch time is within one hour and the primer is dry to handle within 6 hours. Due to the fact that this is a water-reducible system, a high relative humidity will retard the cure time while a low relative humidity will accelerate the process.

Since the sprayed primer contains water, care must be taken to insure the surface is dry to touch before application of urethane topcoats.

Premature topcoating may lead to an undesirable reaction between the water evaporating from the primer and the catalyst component of the urethane being applied. General application guidelines for epoxy primers. Wait hours prior to topcoating Use within 8 hours Thickness 0. Wait hours prior to topcoating. Use within 8 hours Thickness 1. Use within 6 hours Thickness 1. Make sure surface is free of water prior to topcoating Follow the instructions from the manufacturer.

Spray with one full coat Wait hours prior to topcoating Use within 4 hours Thickness 0. If aluminum only, 0. Note: Times prior to topcoating are for 70 oF. At 60 oF, doubling the time may be necessary to get adequate curing for topcoating.

The four CARC topcoats provide chemical agent resistance and color for the system. In addition, the polyurethanes exterior surfaces provide camouflage protection to visible and near infrared means of detection, while the epoxy interior surfaces provides a smooth, easily-cleaned surface which is resistant to wear. These coatings also offer improved performance and prolonged service life. The CARC topcoats inhibit absorption of chemical agents into the paint film and allow the decontamination process to be simplified.

It is best to apply the topcoat to a freshly primed substrate within 24 hours. The drying time between priming and topcoating should be no more than hours, but in no case less than the minimum time specified for the recoating test of the material specifications.

Dipcoating is not recommended for the CARC topcoats see 3. If topcoating proceeds after hours, either scuff sanding followed by a solvent wipe or a primer mist coat is required. Adhesion testing see 4. As with CARC primers, application should be by brush or spray, the paint and substrate should be approximately the same temperature, and ambient temperature should be between 60 and 90 oF at application and for a period of time after application sufficient to assure adequate cure prior to exposure to adverse conditions see 4.

For ordering information NSN see appendix A; for health, safety and environmental information, see Appendix B; and for application equipment and techniques, see Appendix C. The specific information below for the four topcoats is summarized in table III. This specification covers both camouflage and non-camouflage, chemical agent resistant, aliphatic polyurethane coatings for use as a finish coat on military combat equipment.

It is two component, lead and chromate hexavalent free, and is available in two types. MIL-C is intended to provide a film which can be easily and effectively decontaminated after exposure to liquid chemical agents. It can be applied over any of the five epoxy primers described in 3. It should not be applied over an existing alkyd or lacquer finish.

As a camouflage topcoat, it should be applied to exterior surfaces and interior surfaces routinely visible from the outside; e. Component A shall be thoroughly mixed by stirring or agitation to a smooth, homogeneous state. Care must be exercised to redisperse any pigment which may have settled to the bottom of the container.

Component A which contains grit or seeds after thorough mixing or which has thickened abnormally should not be used. Component B shall be a clear to pale yellow liquid which is free of crystals or sediment. A cloudy, milky, or crystalline gel indicates that the catalyst should not be used. If the container for component B is swollen, do not open it.

Dispose of it as a hazardous waste.

Both components should always be measured because accuracy is very important. MIL-C should be mixed four parts by volume of component A with one part by volume of component B. Always add component B to component A.

Mil-dtl-53072 c chemical agent resistant coating system

Components from different manufacturers shall not be mixed. After combining the two components, the coating should be thoroughly mixed into a smooth, homogenous state. Burkard Industries is nationally recognized for our military coating services which include military approved zinc phosphate, e-coating, chemical agent resistant coating CARC and CARC powder coating.

Military-grade specification coating - Burkard Industries Military Coating. The United States military relies on Burkard Industries to provide superior quality for zinc phosphate coating, electrocoating e-coating , chemical agent resistant coating CARC , and powder coating. Military Coatings Mil-Spec We have access to all military specifications and our painters have vast hands on experience with military coatings for both wet paint and powder. The CARC system of cleaners, pretreatments, primers, and topcoats is designed for use on the exterior and interior of tactical military equipment.

It may also be used where severe exposure situations require a coating with excellent durability and corrosion resistance. It is a two part polyurethane that is resistant to water, petroleum, acids, biological and radioactive agents.

This document covers the general requirements for application and inspection of the chemical agent resistant coating CARC system used on tactical military equipment. It is intended for use as a guide in selection of the appropriate materials and procedures, and as a supplement to information available in the below referenced cleaning, pretreating, and coating specifications.

The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples.

While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed.

Beneficial comments recommendations, additions, deletions and any pertinent data which may be of use in improving this document should be addressed to: U. The following specifications, standards, and handbooks form a part of this document to the extent specified herein.

Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards DODISS and supplement thereto, cited in the solicitation see 6. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. The following documents form a part of this document to the extent specified herein.

Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation see 6. Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.

Box , Granbury, Texas In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. Application of the CARC system consists of four distinct steps, each of which is critical to the performance of the overall system; cleaning, pretreating, priming, and topcoating.

The cleaning and pretreating procedures are standard methods required in any finishing process. Otherwise adhesion and the CARC system may be adversely affected. The anticorrosive primers are epoxies, and the topcoats are polyurethanes for exterior surfaces and an epoxy for interior surfaces.

In addition, each batch of polyurethane topcoat must be checked by the specification preparing activity SPA for validation of the spectral reflectance camouflage properties and DS2 resistance.

The local safety office, preventative medicine activity, and local medical support facility must be consulted prior to initiating CARC application. For guidance, see appendix B. For miscellaneous requirements, see 3. Pertinent specifications are listed in table I. Improperly cleaned surfaces are unacceptable because they limit or interfere with paint adhesion, causing subsequent paint loss in service, which will leave the substrate unprotected from the environment. Unless otherwise specified, the surface should be thoroughly cleaned according to TT-C Method of cleaning is determined by the base material properties, the nature of the soil and the degree of contamination and by use of any of the methods or combination of the methods below: a.

Chemical methods such as solvent cleaning, alkaline cleaning, acid cleaning, pickling, descaling with hydride or paint stripping , or b. Electrochemical cleaning methods such as electropolishing, electrolyte alkaline, or electrolytic pickling , or c. Mechanical means such as blasting, chipping, wire brushing, or grinding. Detergents or solvents must be used to remove soil prior to abrasive blasting or mechanical cleaning. After cleaning, all surfaces shall be kept free from dirt, dust, finger marks, and other contaminants.

Meticulous cleaning prior to pretreatment and painting operations cannot be overemphasized since this factor is of prime importance in obtaining a satisfactory coating meeting the requirements of this specification. Unless otherwise specified, ferrous metal surfaces to be painted shall be cleaned in accordance with 3.

Blast-cleaned surfaces that are to be pretreated with wash primer shall be chemically treated within four hours and dried for at least one hour at 70 oF to ensure completeness of the chemical reaction prior 5 MIL-DTLC to application of a primer.

This is done to improve the adhesion of the prime coat that should be applied as soon as practicable after pretreatment. If more than four hours pass before pretreatment, the blasted surface must be inspected and found free of corrosion or foreign matter, and pass the water break test see 4.

Blasting shall not be used on surfaces which could be damaged, such as machine parts and sheet metal thinner than 16 gage 0. Blasting is optional on components painted for protection during limited storage, from which the paint will be worn off as soon as the equipment is placed in use.

Examples are track assemblies, track roller assemblies including mounting frames , interiors of weld-type box sections, bulldozer components including rippers, scarifiers, ejectors, push plates, blades, bowls, and buckets , scrapers and crane shovels, interiors of cement mixer drums, and interiors of aggregate driers.

However, these surfaces shall be dry and free from oil, grease, dirt, and rust prior to painting. Ferrous metal surfaces of vehicles shall be cleaned for painting in accordance with 3.

Sheet metal and sheet metal parts of 8 gage 0. Zinc surfaces, including zinc-coated substrates, need to be cleaned and activated prior to being pretreated for painting as specified in 3.

Aluminum and aluminum alloys shall be cleaned in accordance with 3. After cleaning, all surfaces shall be kept free from dirt, dust, fingerprints, and other contaminants until treated as specified in 3.

Prior to pretreatment, the surface must pass the water break test described in 4. Chemical surface treatments for metallic substrates provide improved adhesion for subsequent coatings and temporary protection from corrosion.

MIL-C | Tinta | Epóxi

For best results, the pretreatment shall be applied as soon as possible after proper cleaning see 3. The two most common types are straight conversion either chromate or phosphate and organic vinyl wash primer modified conversion. These surfaces shall be treated as soon as possible after cleaning as specified in 3. These organic pretreatments are applied to clean metal surface to prepare it for a more permanent protective anticorrosive primer.

Although wash primers afford some protection for up to 24 hours, they are not intended for permanent protection and should be coated with primer as soon as practicable, but no more than 24 hours later. Otherwise, it shall be stripped and the finishing process started again. Under standard atmospheric conditions of 60 to 90o Fahrenheit F , the material is sufficiently dry for recoating one hour after application.

The pretreatment should not be applied to wet surfaces. The dry film thickness should be from 0. To prepare DOD-P, the resin component should be well stirred with care taken that all settled pigment is completely dispersed.

The acid component should be added slowly with stirring, continuing until a complete blending of the mixture is assured. The pretreatment material is then ready for use. If the resin component is thickened or gelled, do not add the acid component until fluidity has been restored.

This can be achieved by warming it up. The pretreatment is most effective when freshly mixed and must be used within 8 hours after the addition of the acid component. The quantity of pretreatment mixed for use shall be the amount required for immediate application. The acid component is not thinner. It is a necessary activator and must be used exactly as directed.

Aluminum surfaces shall be treated as soon as possible after cleaning as specified in 3. Minimum thickness of 0. Unless otherwise specified see 6.

Wood shall be dried to the specified moisture content appropriate for the size, species, and ultimate service conditions, but in no case greater than 20 percent. Wood which will be painted with CARC shall be sealed with a polyurethane-based wood sealer.

The primer shall be applied to a clean, dry surface as soon as possible after cleaning and pretreating. The ambient temperature should be between 60 and 90 oF, but the primers may be applied outside this range without adverse effects, provided appropriate quality control checks are performed see 4.

The paint and surface shall be approximately the same temperature, and application shall be by brush or spray, depositing a continuous, adherent, dry film which is smooth, even, and free from runs, sags, or other defects which might interfere with the application and adhesion of subsequent coats see 4. If paint heaterso are used to assist in application, the substrate to be coated must be at least at an ambient temperature of 60 F. Dipcoating is not recommended for CARC primers.

The five anticorrosive primers are epoxies, and all are two component products. They are applied to metal substrates to provide corrosion resistance and a surface to which the CARC topcoat will firmly adhere. As two component products, they dry by a two stage process of solvent evaporation and chemical crosslinking, and they have a finite potlife, typically 8 hours. Environmental conditions, particularly temperature and relative humidity, will affect potlife, curing, and adhesion.

For ordering information NSN see appendix A; for health, safety and environmental information, see appendix B; and for application equipment and techniques, see appendix C. In areas where air quality regulations restrict volatile emissions, do not add thinner to the coating material if that addition will exceed the regulatory limit.

The specific information below for the five primers is summarized in table II. The specification contains formulations that allow for standard pigments type I and low infrared reflective pigments type II.

It also differentiates between two classification systems, class C and class N. Class C contains strontium chromate based corrosion inhibitors and class N contains non-chromate based inhibitors. This primer is intended for use on pretreated aluminum alloy surfaces as a corrosion inhibitive, chemical resistant primer.

It is compatible with CARC topcoats. Type II shall not be used, except on aircraft where specifically authorized. Thoroughly stir each of the components separately prior to admixing. While slowly pouring component B into component A, continue to stir until the manufacturers specified volume mixing ratio is achieved. Reduction of component A pigmented solution with component B clear solution shall be per manufacturers instructions.

Component B shall always be added to component A, and this procedure shall not be reversed. The temperature of each component shall be 65 to 95 oF before mixing. The reduced primer should be continuously stirred to allow thorough mixing and to counter pigment settling. It should then be strained through a 40 mesh paint filter or equivalent and allowed to stand at room temperature for 30 minutes to allow primer adequate time to induct or follow the manufacturers instructions.

All surfaces to be painted must be thoroughly cleaned as specified in 3. To insure a chemically clean surface, perform the test in 4. Failure to comply with 4. The primer should be sprayed with one full wet coat and needs to dry up to 6 hours dry to touch before applying the topcoat. Time will depend on conditions. The admixed primer must be used within 8 hours after mixing to insure performance.

The dry film thickness should be between 0. The largest factor affecting cure is temperature. The effect of decreasing temperatureo within a facility's painting area will double the cure time for each 18 degree drop in temperature under 70 F.

The cure time can be accelerated by a heated atmosphere. The primer furnished under this specification shall be products which are authorized by the qualifying activity for listing on the Qualified Products List QPL see 6. This specification covers a flash drying, corrosion inhibiting epoxy primer for ferrous and nonferrous metals. It is a two package system consisting of a pigmented epoxy resin part A and a polyamine - epoxy adduct catalyst part B.

This primer is intended for use on properly cleaned and pretreated ferrous and nonferrous surfaces. It is an acceptable primer system to use with CARC topcoats and provides a lead and chromate free formulation. The components shall be thoroughly mixed prior to and after admixing. Mix four parts of part A to one part of part B by volume and stir until well blended.

The thinned primer should be thoroughly stirred, strained through a 40 mesh paint filter or equivalent and allowed to stand 30 minutes prior to use and should continue to be stirred throughout the primer application. After completion of the 30 minute induction period, the primer shall be sprayed to a dry film thickness between 1.

Pdf mil dtl 53072

The primer need only be set to touch before applying the topcoat. The admixed type I primer must be used within 8 hours after catalyzing to insure performance, but type II material must be used within four o hours.