00000nam 2200000zi 4500 9.870024 CaOODSP 20221107163017 m o d f cr nn||||||||| 190315t19711971oncd obt f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- M38-1/243-1971E-PDF M38-1/243 Kerby, R. C., author. Effect of impurities on the current efficiency of zinc electrodeposition / R.C. Kerby and T.R. Ingraham, Extraction Metallurgy Division. Ottawa : Department of Energy, Mines and Resources, Mines Branch, April 1971. ©1971 1 online resource (iv, 35 pages) : charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier Research report ; R 243 Cover title. Digitized edition from print [produced by Natural Resources Canada]. "April 1971." Includes bibliographical references (pages 32-35). "The current efficiency of zinc electrodeposition from acidic zinc electrolytes was found to be adversely affected by a number of single metallic impurities--in particular, rhodium,platinum, gold, silver, tungsten, antimony, germanium, tellurium and copper--and by combinations of metallic impurities such as cobalt, copper and nickel with antimony and arsenic. The decrease in current efficiency of zinc electrodeposition appeared to be related to several factors, including a decrease in hydrogen overvoltage on certain areas of the zinc electrodeposit, the formation of local galvanic cells in the zinc electrodeposit leading to increased corrosion, an increase in catalytic evolution of hydrogen in the case of antimony and mercury, and the possible alteration of the growth morphology of the zinc electrodeposits by impurities. The current efficiency of zinc electrodeposition was determined by measuring the rate of cathodic hydrogen evolution by means of a thermal conductivity cell"--Abstract, page i. Includes abstract in French. gccst Metals Ingraham, Thomas R., author. Canada. Department of Energy, Mines and Resources. Canada. Mines Branch. Canada. Extraction Metallurgy Division. Research report (Canada. Mines Branch) R 243. (CaOODSP)9.855660 PDF 1.58 MB https://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-1/M38-1-243-1971-eng.pdf