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Effects of zincate treatment on the adhesion of electroless Ni-P coating on a 2017 aluminum alloy

2004; Japan Institute of Light Metals; Volume: 54; Issue: 5 Linguagem: Inglês

10.2464/jilm.54.169

1880-8018

Makoto Hino, Koji Murakami, Minoru HIRAMATSU, Keiko Chen, Atsushi SAIZYO, Teruto Kanadani,

Advanced Welding Techniques Analysis

In this study, we have examined the effects of the zincate pretreatment and heat aftertreatment on adhesion of electroless Ni–P coating onto aluminum alloy substrate.The precipitation state of zinc was differs with the number of zincate treatment, and the double zincate treatment markedly improved the adhesion between aluminum alloy substrate and Ni–P coating. This adherent improvement can be attributed to metallurgical bond occurred by the diffusion between aluminum alloy substrate and Ni–P coating under the plating temperature (363 K×7.2 ks).