Published: Jan 1985
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The internal corrosion of tinplate and lacquered tinplate containers is extremely complex and is a function of many interacting parameters. Electrochemical tests give an insight to the main reaction pathways controlling such corrosion but are not widely applicable to real situations. Industry is forced to rely on expensive and time-consuming pack tests when contemplating changes in either the design of the container or the characteristics of the product packed.
This paper describes an accelerated test that takes the form of a simulated can, which has been developed and used at the International Tin Research Institute over the last decade. The results of investigations into particular aspects of tinplate corrosion using this test are described and related to industrial experience with real containers. Providing care is taken in the interpretation of results, it is felt that the accelerated test provides a reliable way of reducing the need for pack testing.
corrosion tests, accelerated tests, tin coatings, cans, canning, solders, lacquers
Head of metallurgy and tinplate division, International Tin Research Institute, Perivale, Greenford, Middlesex
Assistant Manager, Tin Research Institute, Inc., Columbus, OH