ASTM B252-92(2014) PDF

Scope: 4.1 The performance and quality of electroplated or conversion-coated zinc alloy die casting depends upon the surface cleanliness and condition. Various metals are electroplated or conversion coatings are established on zinc alloys for decorative or engineering finish. The common electroplates applied are usually copper, nickel, and chromium for decorative and functional uses. The common conversion coatings applied are phosphates, chromates, and anodized coatings. Electroplated zinc die castings and conversion coatings on zinc die castings are used in many industries such as the marine, automotive, plumbing fixtures, and appliance industries.

1.1 This guide is intended as an aid in establishing and maintaining a procedure for preparing zinc alloy die castings for electroplating and conversion coatings. It is primarily intended for the preparation of Alloys UNS Z33521 (AG-40A) and UNS Z35530 (AC-41A) (Specification B86) for electroplating with copper, nickel, and chromium (Specification B456).

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 standard 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 B252-92(2014) Referenced Document

ASTM B456 Standard Specification for Electrodeposited Coatings of Copper Plus Nickel Plus Chromium and Nickel Plus Chromium*， 1995-04-20 Update
ASTM B6 Standard Specification for Zinc*， 2023-04-01 Update
ASTM B86 Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings*， 1998-04-20 Update

2020 ASTM B252-92(2020) Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
1992 ASTM B252-92(2014) Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
2009 ASTM B252-92(2009) Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
1992 ASTM B252-92(2004) Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
1992 ASTM B252-92(1998) Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings