SAE J1837-2017
SAE J 1837-2017

Electroplate Requirements for Decorative Chromium Deposits on Zinc Base Materials Used for Exterior Ornamentation

标准号

SAE J1837-2017

发布日期

2017年12月01日

实施日期

2017年12月22日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

SAE - SAE International

引用标准

7

适用范围

This SAE Standard covers the physical and performance requirements for electrodeposited copper@ nickel@ and chromium deposits on exterior ornamentation fabricated from die cast zinc alloys (SAE J468 alloys 903 and 925)@ and wrought zinc strip (ASTM B 69). This type of coating is designed to provide a high degree of corrosion resistance for automotive@ truck@ marine@ and farm usage where a bright@ decorative finish is desired. Purpose??This document details the physical and chemical properties that are necessary to optimize coating appearance and durability of decoratively plated parts. When properly applied@ the electroplate described in this document has a bright@ highly reflective@ and specular finish with an inherently high degree of corrosion resistance. The coating's resistance to a corrosive environment is highly dependent on the proper maintenance of the processes used to produce the coating. Since the treatment of processing variables is outside the scope of this document@ it is important for applicators of this coating to develop an intimate knowledge of their process@ and control all parameters that affect the quality of the end product. The use of techniques such as statistical process control (SPC)@ capability studies@ design of experiments@ process optimization@ etc.@ are critical to produce a material of consistently high quality. The subjects included in this document are: substrate preparation@ metal finishing@ plate thickness@ electrochemical potential difference@ ductility@ chromium microdiscontinuity@ accelerated corrosion@ adhesion@ bend testing@ and sampling. The appropriate specification limits and test methods are described in each section. Where possible@ the test methods specified are well established and accepted within the plating industry. In a few instances@ several test methods are specified. In these cases@ it is up to the purchaser and supplier to agree on the test method to be used.