1. Scope

1.1 This guide covers cleaning and conditioning treatments used before metal deposition (Section ), and immersion deposit/strike procedures (Section ) that enhance the adhesion of metals that are subsequently applied to aluminum products by electrodeposition or by autocatalytic chemical reduction.

1.2 The following immersion deposit/strike procedures are covered:

1.2.1 Zinc immersion with optional copper strike (6.3).

1.2.2 Zinc immersion with neutral nickel strike (6.4).

1.2.3 Zinc immersion with acetate-buffered, nickel glycolate strike (6.5).

1.2.4 Zinc immersion with acid or alkaline electroless nickel strike.

1.2.5 Tin immersion with bronze strike (6.6).

1.3 From the processing point of view, these procedures are expected to give deposits on aluminum alloys that are approximately equivalent with respect to adherence. Corrosion performance is affected by many factors, however, including the procedure used to prepare the aluminum alloy for electroplating.

1.4 This guide is intended to aid electroplaters in preparing aluminum and its alloys for electroplating.

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. For specific precautionary statements see Section and Appendix.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

B85 Specification for Aluminum-Alloy Die Castings

B179 Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting Processes

B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate

B209M Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)

B221 Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

B221M Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)

B322 Guide for Cleaning Metals Prior to Electroplating

B432 Specification for Copper and Copper Alloy Clad Steel Plate

E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

Keywords

Aluminum alloys; Brass electrodeposition; Cadmium metals (coating/plating); Chromium electroplating; Electrodeposited Cu coatings; Electrodeposited gold coatings; Electroplated coatings; Nickel coatings; Silver (electrodeposited); Specimen preparation (general)--electroplating; Tin metals/alloys--electrodeposited coatings; Zincate process; Zinc electrodeposited coatings;

ICS Code

ICS Number Code 25.220.10 (Surface preparation)

DOI: 10.1520/B0253-87R05E01

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