ASTM-B252 Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings

ASTM-B252 - 1992 R14 EDITION - CURRENT
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Standard Guide for Preparation of Zinc Alloy Die Castings for Electroplating and Conversion Coatings
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Scope

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.

Significance and Use

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.

Keywords

ICS Number Code 77.150.60 (Lead, zinc and tin products)

To find similar documents by ASTM Volume:

02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)

To find similar documents by classification:

77.150.60 (Lead, zinc and tin products)

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Document Number

ASTM-B252-92(2014)

Revision Level

1992 R14 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Nov. 15, 2014

Document Type

Guide

Page Count

5 pages

Committee Number

B08.02