Designation: A — 05€* This specification is under the jurisdiction of ASTM Committee A01 Provided by IMS under license with ASTM. The ASTM A passivation standard ensures high quality results for passivated stainless steel. Learn how Able Electropolishing meets these standards. Buy ASTM A /AM: SPECIFICATION FOR CHEMICAL PASSIVATION TREATMENTS FOR STAINLESS STEEL PARTS from SAI.
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QQ-PC, but 055 includes a number of alternative passivation treatments. This cycle shall be repeated a minimum of twelve times. Last previous edition approved in as A — 01e1.
Not all of the following tests are suitable for all grades of stainless steel. A number in parentheses indicates the year of last reapproval. Practice A—Water Immersion Test The cloth shall be in contact with the steel for an area of at least 20 square inches cm2. The suitability of such passivation treatments for use in 3 meeting the requirements of this speci? Such treatments may include externally applying an electrical potential on the stainless steel parts, as in the case of electropolishing.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonewstmor service astm.
ASTM A Passivation Standards | Passivated Stainless Steel Parts
Immersion bath to be controlled at a pH of 1. The SI units given in parentheses are for information only. Able Electropolishing provides metal passivation services that meet the ASTM A standards, as well as other w967 treatments that improve the corrosion resistance of stainless steel and various other alloys. Active view current version of standard. The number of samples tested from a lot subject to retest shall be twice the original speci?
Treatments in Nitric Acid Solutions 6. The pad shall be maintained wet through the test period, either by a method of retarding external evaporation, by the further addition of potable water, or by backing the pad with a sponge or similar water source.
ASTM A – 05 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
The surface of stainless steel resulting from these treatments is free of scale, free iron, and asrm foreign matter, and does not require a separate treatment for passivation as de? Precision Machining Technology Show. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless steel parts.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
ASTM A967 Passivation Standard
Current edition approved Sept. An example would be application of Practice C on some lesser-alloyed martensitic or ferritic stainless steels. The processor is not required to reveal the precise composition of proprietary chemical mixtures but shall maintain a unique identi?
The effectiveness of any passivation treatment is demonstrated by the parts meeting the speci? At the end of this period, the surface shall be carefully rinsed and dried with care taken not to disturb copper deposits if present.
This test is not recommended for detection of free iron on ferritic or martensitic series stainless steels, because these steels will give a positive indication 055 of the presence or absence of anodic surface contaminants. The SI units given in parentheses are for information only.
NOTE 1—The selection of medium and procedures for a neutralization depends of the chemistry of the passivation and on economic considerations. The cloth pad used shall be used for only one such test, being changed for each test so as to avoid risk of contamination. The presence of exogenous surface contamination, including dirt, grease, free iron from contact with steel tooling, and so forth, may interfere with the formation of the passive?
The formation of a dark blue color within 30 s denotes the presence of metallic iron. 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.
It is especially useful for large parts that have been uniformly cleaned but that are inconvenient for reasons of size of equipment or ease of handling of the part to place in the environments de? Practice B—High Humidity Test The ASTM provides instructions and acceptance criteria for these and other tests that can verify the quality of a stainless steel passivation operation. These ASTM-approved tests may include: Electropolishing and Passivation Standards.
Such treatments, also sometimes called passivation in common usage, are designated as post-cleaning a96 in this speci? Treatments in Citric Acid 7. It makes no recommendations regarding the suitability of any grade, treatment, or acceptance criteria for any particular application or atm of applications. Your comments will receive careful consideration at a meeting of the responsible technical committee, asfm you may attend.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? After removal of the cloth pad, the surface of the part shall be allowed to dry in air before inspection. Stainless Steel Passivation and 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.
A97 ASTM A passivation standard applies to the cleaning, passivation and testing of stainless steel parts. Appendix X1 gives some nonmandatory information and provides some general guidelines regarding the x967 of passivation treatment appropriate to particular grades of stainless steel. The passivation process de? May 15 — 16, Boston, MA. The cleaning of these contaminants from the stainless qstm surface will facilitate the spontaneous passivation by allowing the oxygen uniform access to the surface.
Precision and Bias When electrochemical cleaning is required, it shall be performed in accordance with Practice B Cleaning by mechanical methods or other chemical methods is recommended.