Improved corrosion resistance of pulse plated nickel through crystallisation control

When electrodeposition of Ni is used for corrosion protection of steel two aspects are important: the porosity of the coating and the resistance against corrosion provided by the coating itself. Using simple pulsed current plating, the size of the deposited crystals can be significantly smaller, the...

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Veröffentlicht in:Journal of applied electrochemistry 1995-04, Vol.25 (4), p.347-352
Hauptverfasser: TANG, P. T, WATANABE, T, ANDERSEN, J. E. T, BECH-NIELSEN, G
Format: Artikel
Sprache:eng
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Zusammenfassung:When electrodeposition of Ni is used for corrosion protection of steel two aspects are important: the porosity of the coating and the resistance against corrosion provided by the coating itself. Using simple pulsed current plating, the size of the deposited crystals can be significantly smaller, thereby reducing porosity correspondingly. This usually also leads to improved hardness of the coating. Introducing pulse reversal plating, the most active crystals are continuously dissolved during the anodic pulse, providing a coating with improved subsequent corrosion resistance in almost any corrosive environment. This correlation between film texture and corrosion resistance is discussed.
ISSN:0021-891X
1572-8838
DOI:10.1007/BF00249653