CORROSION RESEARCH ROUND‐UP

Abstract

U.S.A. Effect of corrosion on the gas permeability of nickel electrodeposits. To determine plating failures due to porosity and relation of gas permeability, authors used modification of low pressure‐constant overpressure method and photographic technique as used in AES Projects 6 and 13. Initial permeability was determined for bright, Watts' type, cobalt‐nickel, sulphamate, and nickel + chromium electrodeposited films. Results are presented for corrosion of these films in 10% sulphuric acid and for Pinner‐Pierce anodic corrosion test in 3% sodium chloride solution. Although it has been demonstrated that consistent results can be obtained by this method and that there is definite difference between metallurgical nickel and electrodeposited nickel with respect to permeability of helium gas, it is not possible to correlate gas permeability of thin foils required for such permeability measurements with service corrosion characteristics of nickel electrodeposits, in that Watts and cobalt‐nickel deposits (considered more corrosion resistant than organic nickel deposits), showed both greater initial porosity and more rapid increase in porosity under accelerated corrosion tests than did organic bright nickel deposits. Tables, graphs.—(D. G. Foulke and J. M. Tobin, Tech. Proc. AES, 1956, 234–238.)

Citation

(1958), "CORROSION RESEARCH ROUND‐UP", Anti-Corrosion Methods and Materials, Vol. 5 No. 10, pp. 337-340. https://doi.org/10.1108/eb019506