Part 2—The Alloy-Tin Couple Test—A New Research Tool

A new 20 hour electrochemical test which measures the current flowing between pure tin and tin plate detinned to the alloy layer, coupled in deaerated grapefruit juice, shows good correlation with rate of detinning in grapefruit juice test packs. The test detects variations in corrosion resistance not measurable with other known short-term tests. A theory of tin plate corrosion based on relative porosities of tin and alloy layers has evolved from this work, providing a better understanding of factors involved in tin plate corrosion. This alloy-tin couple (ATC) test serves as a valuable tool in tin plate research. 2.3.5, 6.3.14