Packaging materials

Why corrosion and seam leakage appear in tinplate fish cans after retort processing Corrosion spots and occasional seam leakage in retort-processed canned fish rarely show up without warning. In brine-heavy products stored for long periods, small weaknesses in coating coverage or seam geometry tend to surface only after thermal cycling and moisture exposure have done their work. For procurement teams and quality engineers, understanding why tinplate fish can corrosion and seam leakage after retort occurs is less about assigning blame and more about identifying which material–process interactions deserve closer verification before the next production run. A simplified double seam diagram highlights where overlap, tightness, and sealing compound determine resistance to … 続きを読む