Abstract
BISRA 1958. Thickness measuring instruments may not be as accurate as their makers claim, judging from the results of some long‐standing researches on methods of corrosion testing which have been completed by the Corrosion Section of the British Iron and Steel Research Association. In the Annual Report for 1958, published last month, it is stated that collaborative tests on various commercial thickness testers for metal coatings on steel were carried out. More than 4,000 thickness measurements were made on 18 different types of aluminium and zinc coatings with seven different instruments. Statistical analysis of the results showed that there are considerable variations in the performance of the instruments.
Published Version
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