Gray zinc is the true color of zinc, so is the color of zinc plate. The galvanized appearance is gray, which is common in galvanized products such as galvanized steel pipes. Zinc plating is rich in color and is formed after passivation. Common colors are colorless, black, white and blue. Zinc plating, if not passivated, will soon turn gray, because zinc is a lively metal.
Tin is relatively stable in the air and is white. The color of tin ingots is silvery white. Hot tin plating or electroplating tin is white, and electroplating tin is also dull, which is formed by different electroplating additives. Matte tin will become silvery white after high temperature welding, and it can endure for a long time in the air before it gradually darkens.