Experts in Tin Plating Depending on the tin plating technology utilized, processes face challenges including excessive tin loss, sludge generation, high process costs, and narrow process temperature ranges. By nature, the PSA (phenol sulfonic acid) electrolyte process draws tin toward the edges of the steel strip while plating, resulting in uneven plating and high tin consumption while the halogen process creates the highest amount of Sn sludge, leading to higher costs, and inconsistent quality.