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topic 1205

Test specifications, ASTM, MIL, AMS, etc.


I would like to know if there are any standard specifications used in the plating industry on 1) paint adhesion test on zinc or cadmium surfaces using tape or something, 2) corrosion test using X-scribe on coupons. If so, could you please tell us the numbers.

Mandar Sunthankar
- Fort Collins, Colorado


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James Watts
- Navarre, Florida


Military specifications for plating, such as QQ-P-416 [link by ed. to spec at Defense Logistics Agency,] (cadmium) detail how adhesion testing is to be performed. For instance, plate a test coupon, subject it to chromate treatment, if required, prime and paint using your normal paint system. Then, scribe three parallel lines 1/4" apart, then 3 more lines perpendicular to the first lines. Apply 3-M brand #250 masking tape across the lines. Rub the tape to make sure no bubbles, etc.

Quickly pull the tape off and examine at the junction of the crosses. This will show how well both the paint and the cadmium adhered. Additionally, you can perform a bend test for adhesion where the test coupon is bent over a mandrel until the coupon fractures. You then try to lift the plating at the fractured area. If it doesn't lift, you've got good adhesion. You can also do a bake test. I believe the spec tells you what time and temperature to bake, then observe the coupon for blisters.

Wanda J. Certo
- Defense Logistics Agency


I worked for a power equipment manufacturer that used a similar test as mentioned in the QQ-P-416 above except that we used a tool that held 11 exacto type blades. We made both horizontal and vertical cuts that gave a grid of 100 squares. Using some type of tape, we would rub the tape and quickly pull the tape off and examine how many square came off. There was a standard that dictated the requirement. Does anyone know if this is an industry test and what the test spec is?

Scott Force


I would like to know if there are any standard specifications used in the coatings adhesion test on wood With a different thickness Thanks C.Eng Hayder.

Hayder Al-Mahdi


I would like to know if there are specifications for chamber environmental cold and heat testing.


Brenda K Edger
- Angola IN


I'm looking for some mil specs on vapor corrosion inhibitors. They are Fed. Test Method 101C sub-method 3004, and 4031. Any input would be greatly appreciated. Thank you.

Bradley A. Leonard
- Dublin, Oh U.S.A.


The specification regarding Adhesion testing is BSS 7225. You may also want to check out MIL-STD-151 testing on metals and ASTM ASTM B117 [link by ed. to spec at TechStreet] .


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