On the Properties of Electrodeposited Nickel from Rapid Nickel Solution:For corrrosion protection of cylinder liner

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概要

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• We investigated the various properties of nickel deposits for corrosion protection on the cooling surface of cylinder liner in diesel engine.The following plating baths were used:(1) Watt's bath.(2) Watt's bath containing cobalt sulphate.(3) Mixed bath of nickel sulphate and nickel chloride.(4) Mixed bath of nickel sulphate and nickel chloride containing cobalt sulphate.(5) All nickel chloride bath.(6) All nickel sulphate bath.The Watt's bath is still used today to a large extent and its deposit has good brightness, smoothness and flexibility but poor resistance against erosion.The properties of the deposit obtained from the mixed bath of nickel sulphate and nickel suphlate are similar to those of the deposit from Watt's bath. Adding cobalt sulphate to these bathes, however, we can obtain harder and more durable deposit without any decrease of brightness and flexibility. Finally we found this deposit to be the most suitable one for the protection of cylinder liners.The deposit obtained from all nickel sulphate or all nickel chloride bath has high hardness and good durability, but it is not suitable for the above purpose because of its less flexibility. In addition to this detect it tends to be porous.Owing to high hardness and brittleness the deposit is apt to break out cracks early in its service life. Through these cracks various corrosive agents may penetrate and attack the basis metal until the deposit is flaked off.

• 社団法人 表面技術協会の論文

社団法人 表面技術協会 | 論文

• イオンプレーティング法による厚膜化の現状とピストンリングへの応用
• 自動車用エンジン部品の表面技術と環境対策
• プリント配線基板で発生するイオンマイグレーションと信頼性解析
• イオン交換体の設計と輸送現象
• 半導体膜の低温成長

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