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Zinc Alloy Plating Bath for Duplex Application

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Zinc alloy plating baths in use

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Describes conversion in 3 steps from 17,000 litre alkaline Zn bath to Zn-Iron alloy bath at Elzett, Sopron, Hungary.

Zinc alloy plating comes of age; Meeting Report

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Summaries on lectures incl. motor manufacturer on why Zn alloys are preferable to pure Zn, experiences with zinc iron, zinc cobalt, progress with Zn manganese, post-passivate systems and general trends.

Zinc alloy plating for anti-corrosion

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Zinc Alloy Plating for Customer Requirements

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Case study of jobbers in Carolina offering Zn-Co as replacement for cadmium. Tables list process sequence with control characteristics.

Zinc alloy plating for the automotive industry

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Covers zinc alloys of cobalt, nickel (acid or alkaline) & iron & tin, lists cycles (GM9540P, B) to white corrosion. Also shows Ford specification with salt spray performance & Chrysler test details (in-house standards). General comments on hydrogen embrittlement & corrosion testing, performance comparisons. Tables list hardness, Kesternich sulphur dioxide corrosion, fastener friction factors. 16 refs

Zinc Alloy Plating from Alkaline Electrolytes

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Overview of title processes gives performance data, operating parameters, anode systems, effluent treatment, passivation procedures, corrosion performance (salt spray, Kesternich, cyclic tests) & considers these in relation to in-service performance. 7 refs.

Zinc Alloy Plating of Steel Strip

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Zinc Alloy Plating Process

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Uses brightening agent of quaternary ammonium polymer.

Zinc Alloy Plating Today

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A "Pie chart" shows sectors in which title coatings are used and numerous examples of Zn-Ni or Zn-Co plated work are shown. Typical bath & plating parameters are shown for alkaline zinc alloy dep'n. Results of salt spray corrosion test are shown for Zn & Zn alloys before & after heat treatment (anneal) with & without iridescent chromating - ca 1300 hrs to red rust is best value shown here.

Zinc Alloys & Alternatives to Cadmium Coatings on Steel

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Overview of alternatives such as aluminium vapour deposited ("ivadising") or electroplating. Use of zinc alloys, esp. zinc iron or tin zinc are described with some details of baths. Conversion coatings (chromating & chromate-free) on zinc etc are summarised. Not all are totally eco-friendly. 7 refs

Zinc alloys replacing cadmium

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Suggests that use of tin (70 to 80%), Zn (bal.) alloy coatings is insufficiently appreciated, with their excellent corrosion resistance & solderability which can be better chromated than Zn alone. Acid, alkali, cyanide and non-cyanide bath formulations are available, mainly low maintenance. Process details are given.

Zinc alloys replacing cadmium

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Suggests that use of tin (70 to 80%), Zn (bal.) alloy coatings is insufficiently appreciated, with their excellent corrosion resistance & solderability which can be better chromated than Zn alone. Acid, alkali, cyanide and non-cyanide bath formulations are available, mainly low maintenance. Process details are given.

Zinc Aluminium Alloy Anodes in Zinc Plating

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Study based on polarisation plots, data showing anodic efficiency of anode process & amount of sludge formed under wide range of conditions. Chemical dissol'n in sulphate & CN electrolytes is plotted & Hull cell results are used to assess title anodes. 13 refs.

Zinc Aluminium Alloy Coating for Steel Strip

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