Hot-Dip Tinning Problems & Solutions

A. I have no experience in hot dip tinning or any related technology. But problem faced by Rakesh Jain is interesting. Here is my guess as to what could be happening. As winter approaches in higher latitudes lakes start freezing. It is a gradual process with water and ice coexisting for long periods. One can also see this happening in deep freezers in refrigerators. Probably something similar is happening in the hot tinning bath of Rakesh jain. When you dip a cold object in the hot bath the temperature of the bath drops. If the initial temperature was not high enough and heating rate is much lower than cooling rate, molten tin would solidify forming crystals. I think he needs to increase the heating power and temperature of the bath. Experienced would be better.