CHEM FILM PER MIL C 5541 CLASS 1A

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From Wikipedia, the free encyclopedia. I have a question. When it comes to aircraft up to 5 miles above this ground, I do not like taking chances or cutting corners. Iridite “clear” is qualified as class III when leached. But something different than what you are used to is often a red flag that means it’s time to double check what happened, and that the parts actually will comply with Class 3: By using this site, you agree to the Terms of Use and Privacy Policy. Unless someone knows something I missed, basically all Class 1A approved chemicals will exhibit color after application.

My thinking may be, possible engineering error? But something different than what you are used to is often a red flag that means it’s time to double check what happened, and that the parts actually will comply with Class 3: Unless someone knows something I missed, basically all Class 1A approved chemicals will exhibit color after application. The situation is that you can’t comply with MIL-DTL without processing per its instructions and using the qualified products. Mooney is legally correct, but I have many clients who do a short dip in type 1a, call it type 3, and pass salt spray,. They are designated as a post treatment to ion-vapor deposition IVD aluminum used on many military platforms as a cadmium alternative or galvanic corrosion inhibitor. Alchrome, Alodine, and Iridite are trade names from three different companies for their lines of chromate conversion processes for aluminum.

But you have to download the spec.

The company I work for wanted to know if a class 1 can be used as a substitute for class 3? Class 1A is less electrically conductive than class 3 and has a gold color.

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All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. Alodine and I believe. I have a question.

Note that chromate conversion coatings have been used for over 50 years as treatment to coated or as-fabricated surfaces to boost corrosion resistance and provide a good basis for the subsequent application of paint. It specifies a range of color. As far as I can ascertain, “Clear Coating” can flass be applied per Class 3. From the front page of the spec.: Regards, Ted Mooney, P.

Mooney is legally correct, but I have many clients who do a short dip in type 1a, call it type 3, and pass salt spray. Views Read Edit View history. Flass MIL-DTL specification covers chemical conversion coatings that form protective coatings by chemical reaction with aluminum and aluminum alloy; these coatings are categorized by the following types and classes.

The situation is that you can’t comply with MIL-DTL without processing per its instructions dilm using the qualified products.

MIL-DTL – Wikipedia

And one of the most common chemicals available for this class, i. Retrieved from ” https: Possibly an aircraft appearance item. Class 3 also may have a very light gold tint as they are both processed the same with immersion time in our Alchrome II bath being the only difference. We run into this error quite often and the disturbing thing is that most times the customer cannot answer as to which type they actually require. Iridite “clear” is qualified as class III when leached.

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Class 3 A discussion started in but continuing through Q.

MIL-DTL-5541

Indeed Robert is correct too. Mil-C [link is to free spec at Defense Logistics Agency, dla. This page was last edited on 26 Septemberat It has gained world wide use across many fields versus the more verbose ISO equivalent i.

clasa My thinking may be, possible engineering error? The color per se is not a problem unless you or the ultimate customer if it’s not you specified colorless. You can only comply with Mil-C is you use “Qualified Products” such as these; if you use “home brew” you are not in compliance with Mil-C It will pass salt spray requirements of the spec.

The conversion coatings covered by this specification exceed most commercially available products. In my opinion Alodine is applicable for type 3 coating.

MIL-DTL F CHEMICAL CONVERSION COATINGS ON ALUMINUM

It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. November 14, A. However, these treatments use hexavalent chromium chemicals that are extremely toxic. When it comes to aircraft up to 5 miles above this ground, I do not like taking chances or chdm corners.