| 摘要 |
An electrode for electrolysis of brine and similar processes comprises an inert base metal e.g. Zr, Ta or Ti, coated with a platinum group metal which also contains 0.1-0.7% by weight of carbon. The metal coating is formed by using a solution of a salt of platinum, rhodium, ruthenium, iridium, or a mixture thereof, in an organic chelate which may be deposited electrolytically, and then heated to decompose the chelate at 170-400 DEG C. forming carbon. The coating is improved by a second stage heating up to 700 DEG C., to diffuse the carbon coating in the metal substrate. Chelate compounds specified include acetyl acetone, aceto-acetic ester, malonic ester, cyanacetic ester, and malonic acid nitrile. The platinum metal-chelate coating may be applied by spraying, vapour-coating or by heating the solution in contact with the metal surface. |
