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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.
Note 1—Surface passivation occurs simultaneously with electropolishing under proper operating conditions. The quality of passivation will depend on the type of stainless steel, the formulation of the electropolishing solution, and the conditions of operation. Free iron on the surface of the stainless steel is removed resulting in improved corrosion resistance. Surface smoothing obtained by electropolishing will also improve corrosion resistance. Electropolishing will also remove heat tint and oxide scale.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
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
ISO StandardsISO15730 Metallic and Other Inorganic Coatings--Electropolishing as a Means of Smoothing and Passivating Stainless Steels ISO2080 Electroplating and Related Processes--Vocabulary ISO4519 Electrodeposited Metallic Coatings and Related Finishes--Sampling Procedures for Inspection by Attributes ISO9227 Corrosion Tests in Artificial Atmospheres--Salt Spray Tests
ICS Number Code 49.040 (Coatings and related processes used in aerospace industry)