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This specification covers the passivation by electropolishing of stainless steel alloys in the 200, 300, and 400 series, as well as precipitation-hardened alloys. Basis materials shall be free of clearly visible defects, and if necessary, shall undergo preparatory cleaning procedures prior to electropolishing. Post-coating procedures such as post dip and final rinsing shall be performed as well. The performance of the specimens during passivation shall be evaluated by one or more of the following procedures: water immersion test; humidity test; salt spray test; copper sulfate test; and modified ferroxyl test for free iron.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. 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.
1.1 This specification covers the passivation of stainless steel alloys in the 200 (UNS2XXXX), 300 (UNS3XXXX), and 400 (UNS4XXXX) series, and the precipitation-hardened alloys, using electropolishing procedures.
1.3 This specification may involve hazardous materials, operations, and equipment. This specification does not purport to address all of the safety concerns, if any, associated with its use. 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ISO StandardsISO 15730 Metallic and Other Inorganic Coatings--Electropolishing as a Means of Smoothing and Passivating Stainless Steels ISO 2080 Electroplating and Related Processes--Vocabulary ISO 4519 Electrodeposited Metallic Coatings and Related Finishes--Sampling Procedures for Inspection by Attributes ISO 9227 Corrosion Tests in Artificial Atmospheres--Salt Spray Tests
A380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
A967 Specification for Chemical Passivation Treatments for Stainless Steel Parts
B117 Practice for Operating Salt Spray (Fog) Apparatus
B322 Guide for Cleaning Metals Prior to Electroplating
B374 Terminology Relating to Electroplating
B602 Test Method for Attribute Sampling of Metallic and Inorganic Coatings
D3951 Practice for Commercial Packaging
ICS Number Code 49.040 (Coatings and related processes used in aerospace industry)
ASTM B912-02(2013), Standard Specification for Passivation of Stainless Steels Using Electropolishing, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top