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  • ASTM
    B912-02(2013) Standard Specification for Passivation of Stainless Steels Using Electropolishing
    Edition: 2013
    $91.10
    Unlimited Users per year

Description of ASTM-B912 2013

ASTM B912 - 02(2013)

Standard Specification for Passivation of Stainless Steels Using Electropolishing

Active Standard ASTM B912 | Developed by Subcommittee: B08.07

Book of Standards Volume: 02.05




ASTM B912

Abstract

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. Scope

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.

ASTM Standards

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 Standards

ISO15730 Metallic and Other Inorganic Coatings--Electropolishing as a Means of Smoothing and Passivating Stainless Steels

Keywords

electropolishing; passivation; stainless steel;


ICS Code

ICS Number Code 49.040 (Coatings and related processes used in aerospace industry)


DOI: 10.1520/B0912-02R13

ASTM International is a member of CrossRef.

ASTM B912

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