PS-PLATING译文.docVIP

DAIMLERCHRYSLER CORPORATION NO: PS-PLATING Process Standard Date Published: 2003-12-10 Category Code: H-1 Change: Z EASL Req. Yes Restricted: No ***ZINC- MECHANICAL AND ELECTROPLATED*** 机械镀锌与电镀锌 1.0 GENERAL 总则 1.1 Purpose of the Standard*** 本标准的目的*** This standard outlines the procedures and requirements for electroplated zinc, and mechanically plated zinc coatings on iron and steel parts for corrosion protection. 本标准概述了有关钢铁零件的防腐蚀的电镀锌和机械镀锌涂层的工艺规程和要求。 1.2 Purpose of the Process*** 过程的用途*** This standard provides the procedures and requirements for producing electroplated zinc deposits. Parts with a hardness of HRC 32 or higher MUST be electroplated according to PS-4220 which requires a mandatory bake operation to relieve hydrogen embrittlement. PS-4220 is identical to PS-79 respectively, except for the mandatory bake. This standard also covers the requirements for mechanically plated zinc deposits. The following Process Standards, which were formerly all individual standards and are still referenced on drawings as such, are covered by this one standard: 本标准对生产电镀锌层提供了工艺规程和要求。硬度达到或大于 HRC32 的零件的电镀“必须”按照 PS-4220，其要求－强制烘培过程以消除氢脆性。除去强制烘培，PS-4220与 PS-79 完全相同。本标准同样包含对于机械镀锌层的要求。本标准覆盖，过去所有单独的和至今图纸上仍然涉及的以下标准： PS-79 Zinc-Electroplated PS-4220 Zinc-Electroplated - Hardened Steel Parts PS-1536 Zinc-Mechanically Plated PS-79 电镀锌 PS-4220 电镀锌-硬化钢 PS-1536 机械镀锌 1.3 Part Drawings 零件图纸 A. Requirements shown on the part drawing shall take precedence over the requirements specified in this standard. B. Unless otherwise specified on the drawing, all brazing, welding, machining, forming, and heat treatment shall be completed before parts or assemblies are plated. Staking operations may be performed after the parts are plated. C. The desired deposit thickness must be specified after the process standard number using a code designation. See Section 2.3.2. D. A chromate, chemical surface trea