00000nam 2200000za 4500 9.840985 CaOODSP 20221107151959 cr ||||||||||| 170803s1974 onca ob f000 0 eng d CaOODSP eng n-cn--- M38-8/132E-PDF M38-8/132 Saiddington, J. C. Crack-free chromium from conventional plating baths [electronic resource] / J.C. Saiddington and G.R. Hoey, Extraction Metallurgy Division. Ottawa : Queen's Printer, 1974. p. 923-930 : ill. Reprint series ; RS 132 Cover title. "Reprinted from Plating, vol. 61, no. 10, 1974." Historical publication digitized from print 2017 [by Natural Resources Canada]. Includes bibliographical references. "The formation of cracks in chromium coatings obtained from conventional baths at the bright plating range of current density and temperature can be reduced or eliminated by employing controlled plating interruptions. The interruptions, to be effective, must a) allow dissipation or cause deactivation of the cathode film and b) be frequent enough to prevent the incremental increases of the deposit thickness associated with the formation of sets of cracks. The technique puts no restriction on i) the type of plating interruptions as long as they meet the above specified conditions, ii) the exact control of their frequency, iii) the concentration of the plating bath, iv) the current density and temperature, v) the thickness of the crack-free coating and vi) the type of the substrate, but requires knowledge of the critical thickness at which formation of cracks begins. Plating interruptions may cause loss of luster; appearance deteriorating as the frequency of interruptions increases. With interruptions suitably chosen, chromium becomes crack-free and remains bright on the microscale; thus is acceptable for buffing"--Abstract, p. 923. gccst Steel gccst Processing Hoey, G. R. Canada. Natural Resources Canada. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Reprint series - Dept. of Energy, Mines and Resources, Mines Branch ; RS 132 (CaOODSP)9.834843 PDF 5.03 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M38-8/M38-8-132-eng.pdf 300211