Abstract
alloy layers were formed on unalloyed tinplate specimens heated by immersion in constant‐temperature oil baths and by resistance heating. The data show that the critical factor affecting alloy‐layer‐growth behavior is the rate at which the unalloyed tinplate is heated. As the heating rate is decreased the average alloy‐layer‐growth rate decreases instead of remaining constant. With rapid heating, there is an appreciable interval during which the growth of the alloy ceases or practically ceases.