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Description of ASTM-B912 2013ASTM B912 - 02(2013)Standard Specification for Passivation of Stainless Steels Using ElectropolishingActive Standard ASTM B912 | Developed by Subcommittee: B08.07 Book of Standards Volume: 02.05 ASTM B912Abstract 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.
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 SteelsKeywords 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 B912This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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