The nitric acid treatments are similar to those identified in ASTM A380. In addition, this standard also includes citric acid treatments. Parts treated however must pass specific tests to confirm the effectiveness of the passivation, although in practice the tests are for the detection of the effects of residual iron contamination on the surface of the parts.
Nitric1—The solution shall contain20to25volume percent of nitric acid and2.5+0.5weight percent of sodium dichromate.The parts shall be immersed for a minimum of20 min at a temperature in the range from120to130F (49to 54 C.°° Nitric2—The solution shall contain20to45volume percent of nitric acid.The parts shall be immersed for a …
A 967 2 3. Terminology 3.1 Definition of Term Specific to This Standard—It is necessary to define which of the several commonly used definitions of the term passivation will be used in this specification.(See Discussion.) 3.1.1 Discussion—Stainless steels are autopassivating in the sense that the protective passive film is formed spontaneously
ASTM A967.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Designation: A 967 05e1 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts1 This standard is issued under the fixed designation A 967; the number immediately following the designation indicates the year of original adoption or, in the …
ASTM A967, 2005 Edition, September 1, 2005 - Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts. This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless …
ASTM A967-01E1. Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts. ASTM International / 10-Oct-2001 / 6 pages. REPLACED by ASTM A967-05. 1.1 This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations …