Chemistry: electrical and wave energy – Processes and products
Patent
1977-05-25
1978-08-22
Mack, John H.
Chemistry: electrical and wave energy
Processes and products
204 6, 204 43T, C25D 312, C25D 102, C25D 108
Patent
active
041087402
ABSTRACT:
An article such as a screen printing cylinder prepared from a hard nickel electrodeposit is characterized by improved resistance to embrittlement when exposed to temperatures above about 200.degree. C. Electrodeposits affording improved resistance to embrittlement contain 0.007-1% sulfur and 0.02-5% manganese. The amount of manganese in the electrodeposits is correlated to the amount of sulfur present so that the manganese is present in an amount in excess of the stoichiometric amount required to form manganese sulfide. The electrodeposits which are also characterized by usefully low levels of internal stress are prepared using conventional nickel plating baths modified by the addition of sources of manganese ions and sulfur.
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Vanaja, T. S., and Char, T. L. R., "Electrodeposition of Manganese Alloys . . . " Metal Finishing, Feb. 1971, p. 59.
Nagirnyi, V. M., Isaeva, L. G., et al., "Electrolytic Production. . . . " Vopr Khim. Khim. Tekhnol. Resp. Mezhued. Tenet. Nauch. Tekhn. SB. 1973, vol. 29, pp. 109-113.
Spencer, A. G., "The Corrosion of Nickel Anodes", The Metal Industry vol. 50, pp. 141-144, 1937.
Kenny Raymond J.
Leader William T.
Mack John H.
MacQueen Ewan C.
Petersen Walter A.
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