ASTMB17701工程用钢表面镀铬

Designation: B 177 – 01Endorsed by AmericanElectroplaters’ SocietyEndorsed by NationalAssociation of Metal FinishersStandard Guide forEngineering Chromium Electroplating1This standard is issued under the fixed designation B 177; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide provides information about the deposition ofchromium on steel for engineering uses. This is sometimescalled “functional” or “hard” chromium and is usually applieddirectly to the basis metal and is usually thicker than decorativedeposits.1.2 This guide is not intended as a standardized procedure,but as a guide for obtaining smooth, adherent coatings ofchromium of a desired thickness while retaining the requiredphysical and mechanical properties of the base metals. Speci-fied chromium electrodeposits on ferrous surfaces are definedin Specification B 650.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibilityof the user of this standard to establish appro-priate safety and health practices and determine the applica-bilityof regulatorylimitations prior to use.2. Referenced Docu ments2.1 ASTM Standards:B 183 Practice for Preparation of Low-Carbon Steel forElectroplating2B 242 Practice for Preparation of High-Carbon Steel forElectroplating2B 244 Test Method for Measurement of Thickness of An-odic Coatings on Aluminum and of Other NonconductiveCoatings on Nonmagnetic Basis Metals with Eddy-CurrentInstruments 2B 253 Guid...