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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The tests the ASTM document considers valid are the following:. As far as the stainless steel passivation process itself, you’re atm much always going to work your way back to A ASTM F86 [link by ed. Various organizations and groups present specifications for the processes involved in metal finishing treatments. Supplier Requirements Privacy Policy Links. The standards that collectively make up the ASTM A passivation specification ensure that nitric and citric stainless steel passivation is performed properly and with quality results.
What should I tell my customer?
In the ASTM A and the nitric acid concentrations mentioned must be percentage by volume of a reagent of 67 wt. The best thing do to is ask the customer what they expect. It helps to guard against the elementary forces of the environment into which the component will function in.
It appears that the types are associated with method 1, not method 2. Link to Active This link will always route to the current Active version of the standard. F86 refers to surgical implants of any metallic alloy, and basically just says “do whatever treatment is applicable and appropriate 9a67 ensure corrosion resistance”. A renumbers those to 1 through 4 there is no such thing as A Type 6 or 7 while restores the missing four for a total of eight Types.
Is this a correct assessment? At its basis, the intent xstm this specification is to ensure that metal finishing shop uses either citric or nitric passivation correctly to produce quality results. But again, please describe your situation. a976
This is applicable all across the globe and replicable by any metal finishing shop. March 7, A. The following tests shall be performed on each lot of stainless steel parts: 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.
Especially in the fastener industry I have seen it is difficult to source a specific product according to a specific type within these standards. The chemical reactions of the passivating media on the surface of the stainless steel shall be stopped by rinsing of the stainless steel part, with or without a separate neutralization treatment.
Passivation is one of the most popular forms of metal finishing along with electro and electroless plating and industrial powder coating.
ASTM A967 Passivation Standard
The “right” spec is the one that your customer requires. We design our own parts, and do our own passivation in house, and hence prefer the testing requirements of ASTM A By meeting standards set by the ASTM and other organizations, we can ensure consistently-high quality for a broad range of metal 9a67 across many industries. What is standard to you may not be standard to them.
It’s not possible to diagnose a finishing problem or asfm hazards of an operation via these pages. Free iron denotes iron present on the surface of the parts, including but not limited to iron contamination, ast marks, residual-iron salts from pickling solutions, iron dust, atmospheric exposure, iron deposits in welds, embedded iron, and iron oxide.
This abstract is a brief summary of the referenced standard. Jan, Both standards aztm based heavily on the old QQ-P They supply exact and stringent standards finishing companies rely on to provide the best products possible. You can guess the increase in the amount of testing involved. Is there any clear direction or is it optional? Request a Quote Request Info.
ASTM A Standard Passivation Treatment For Stainless Steel
I am struggling to understand which spec to use for passivation. A discussion started in but continuing through Q.
You should never ask for “standard passivation” on imports. November 27, — this entry appended to this thread by editor in lieu of spawning a duplicative thread A.
zstm I was looking at this thread and had this question AMS [link by ed. Indeed also my conclusion is that it is an omission.
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. These tests include the following practices:. Also, how common is it for a purchaser of a good to specify a specific passivation type in a standard rather than reference the entire standard and leave the type selection up to the manufacturer?
I replied that the parameters are in compliance with standard A but he’s telling that we don’t have objective evidence to support the validation since A defines minimum requirements that could be insufficient to my process. QQ-PB contained six nitric acid bath Types. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM A967 vs. AMS 2700? Which is the right passivation spec?
June 11—13, Chicago, IL. It was cancelled in early in favor of AMS Some customers ask for the parts to pass salt spray testing longer than A’s required 2 hours, etc. He passed away May 14,