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Electrolytic Polishing and Bright Plating of Metals

1948; Nature Portfolio; Volume: 162; Issue: 4126 Linguagem: Inglês

10.1038/162834a0

1476-4687

S. Wernick,

Concrete Corrosion and Durability

IN the author‘s preface and in the foreword by Dr. U. R. Evans, great stress is laid on the commercial value of a brightly finished metal article, be it a piece of a machine or merely a luxury knick-knack. In the foreword it is further pointed out that there is a great practical utility in smoothness, and the examples of reflectors and bearings are quoted ; but it is surprising that he does not mention the fact that electrolytic polishing seems to secure a measure of greater resistance to the normal tarnishing of metal surfaces. Except for a fairly full account of the anodic oxidation of aluminium, which is a rather exceptional case, the author‘s mention of corrosion is more or less limited to a couple of pages (146 and 147) in the chapter on carbon steel. Thus, when one considers the enormous sums of money that are annually expended in combating corrosion, it is surprising that (according to the author) for most metals the extent of the increased protection afforded by electrolytic polishing is rather uncertain.