The ASTM A passivation standard ensures high quality results for passivated stainless steel. Learn how Able Electropolishing meets these standards. 35A, AMS C, ASTM A and ASTM A standards. Passivation alone will not remove heavy adherent oxide films created from heat treatment. Delstar Metal Finishing offers passivation services that meet the ASTM (American Society for Testing and Materials) A standards. The ASTM A standards.
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Combining values from the two systems may result in non-conformance with the standard. The treatments are the following: The tests the ASTM document considers valid are the following:.
Thanks for your time. Stainless Steel Passivation astj More Able Electropolishing provides metal passivation services that meet the ASTM A standards, as well as other finishing treatments that improve the corrosion resistance of stainless steel and various other alloys.
It includes recommendations and precautions for descaling, cleaning, and passivation of stainless steel parts. Jan, Both standards are based heavily on the old QQ-P John Wilt [returning] – Cambridge, Massachusetts. Rest a96 peace, Ken. The tests the ASTM document considers valid are the following: If you do not specify, they can use whatever they want, even ways that are not in any of the specifications!
We design our own parts, and do our own passivation in house, and hence prefer the testing requirements of ASTM A Copper sulfate testing Damp Cloth Test High humidity testing Potassium Ferricyanide—Nitric Acid Test Salt spray testing Water immersion testing The instructions for conducting such tests as well as the acceptable results are also provided.
One of the differences is in the definition of ‘a lot’ for testing purposes.
ASTM A Passivation Standards | Passivated Stainless Steel Parts
There are other in-house specifications for asrm companies. Appendix X1 and Appendix X2 give some nonmandatory information and provides some general guidelines regarding the selection of passivation treatments appropriate to particular grades of stainless steel.
The intent is to remove any foreign or undesirable traits and improve the corrosion resistance of the stainless steel component. A discussion started in but continuing through Q. We appended your question to a thread which should clearly answer it for you: FebAnaheim, CA. 9a67
ASTM A967 Passivation Standard
A chemical treatment shall be applied which will accelerate the formation of the passive film on a chemically clean stainless steel surface. Ray, Thank you for answering. A is a standard covering treatments to awtm stainless steel regardless of what it will be used for and then test methods to show that it was passivated.
But again, please describe your situation. And there are other differences. As you see, we added your question to a thread which already answers it. The ASTM provides instructions and acceptance criteria for these and other tests that can verify the quality of a stainless steel passivation operation. Passivation is one of the most popular forms of metal aatm along with electro and electroless plating and industrial powder coating. Link to Active This link will always route to the current Active version of the standard.
ASTM A967 vs. AMS 2700? Which is the right passivation spec?
The approach involves several steps. I was looking at this thread and had this question The standards of ASTM A provide specific details of the acceptable methods required for passivating stainless steel.
Immediately after the removal from the passivating solution, the parts shall be thoroughly rinsed, using stagnant, countercurrent, or spray washes, singly or in combination, with or without a separate chemical treatment for neutralization of the passivation media. A has a lot of excellent recommendations on general cleaning etc.
Historical Version s – view previous versions of standard. By adhering to the specifications provided them, ProPlate is capable of guaranteeing each product they produce will be as those that follow. QQ-PB contained six nitric acid bath Types. Lee Kremer Stellar Solutions, Inc. The two standards are essentially equivalent.
To me this means volume percent of pure nitric acid, resulting in significantly stronger passivation solutions than AMS The passivation standards listed in the ASTM document embrace a variety of potential methods and techniques.
They also are very specific on such aspects as recommendations and precautions for such things as cleaning, asym and tests. The passivated parts shall exhibit a chemically clean surface and shall, on visual inspection, show no etching, pitting, or frosting.
October 23, A. This is applicable all across the globe and replicable by any metal finishing shop. Lee Kremer has pointed out that A is not a Specification, only a Practice.