Reference

Treatment of electroplating wastes by reverse osmosis

Treatment of electroplating wastes by reverse osmosis. Donnelly, Richard G.; Goldsmith, Robert L.; McNulty, Kenneth J.; Grant, Donald C.; Tan, Michael (Am. Electroplat. Soc., East Orange, N. J., USA). U. S. NTIS, PB Rep., PB-265393, 106 pp. Avail. NTIS From: Gov. Rep. Announce. Index (U. S.) 1977, 77(13), 187 (English) 1976. CODEN: XPBRCA. DOCUMENT TYPE: Report CA Section: 60 (Sewage and Wastes) Section cross-reference(s): 72 Closed-loop reverse osmosis of electroplating using tubular or spiral-wound cellulose acetate [9004-35-7] membranes and hollow-fiber polyamide membranes is described. Reverse osmosis of effluents contg. Ni sulfamate [13770-89-3], Watts type Ni, Cu pyrophosphate [10102-90-6], ZnCl2, Cu, Zn, and Cd cyanides, Ni fluoborate [14708-14-6], and chromic acid is described.

Masking in chemical polishing of transmission gears

Masking in chemical polishing of transmission gears. Mitsuhayashi, Masahiko; Aihara, Hideo (Toyota Motor Corp., Japan). Jpn. Kokai Tokkyo Koho JP 03253582 A2 12 Nov 1991 Heisei, 3 pp. 12597-69-2 and 10102-90-6 are cas registry numbers. These chemicals are also mentioned in this article. (Japan). CODEN: JKXXAF. CLASS: ICM: C23F001-02. APPLICATION: JP 90-50832 3 Mar 1990. DOCUMENT TYPE: Patent CA Section: 55 (Ferrous Metals and Alloys) The teeth (not including the root of a tooth) of transmission gears are masked by electroplating for chem. polishing. Thus, the tooth roots of a gear (pitch diam. 79.05 mm, carburized at 930° for 3 h to 0.7 mm effective depth) were covered by butyl rubber with a stainless steel core embedded in it, electroplated with Cu in an aq. Cu pyrophosphate at 2 A/dm2 to 7 mm thickness, and chem. polished with increased productivity. .