Galvanic Corrosion Behavior of Electroless Nickel Coating in Al-Zubare Harbor-Water | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 25, Issue 9, November 2007, Pages 1056-1063 PDF (169.74 K) | ||
| DOI: 10.30684/etj.25.9.4 | ||
| Author | ||
| Mohammed Hliyil Hafiz | ||
| Abstract | ||
| Electrode potentials in AL-Zubare harbor water (South -Gas Company), of 23.88 ohm-cm at 20oC were reported for 26 metals and alloys including values for electroless nickels that signify a greater passivity than steel. The large potential difference between steel and electroless nickel predicts severe galvanic corrosion, which was confirmed by weight loss data for coupled steel and electroless nickel electrodes immersed in AL-Zubare Harbor water (South -Gas Company, 23.88 ohm-cm at 20oC) .Changes in the phosphorous content in the range of 7.10 to 12.45 percent had only a slight effect on the electrode potential of electroless nickel. This study indicates the beneficial use of electroless nickel coating is more passive than other (metals and alloys) and that galvanic corrosion of active metals such as steel can be severe . | ||
| Keywords | ||
| corrosion; Electoless Nickel Coating; Potential Plating | ||
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