Tritmen bilong pes na insulesen leia bilong kopa waia

Long mekim wok i kamap gutpela moa, ol i save kisim 'coating' tritmen long ol kopa waia: ol kopa waia we i gat tin-plated (wantaim tin leia antap) i save helpim wok bilong solder na stopim 'oxidation', na ol i save yusim planti taim long ol pin bilong ol ilektronik komponen. Nikel-plated kopa waia (wantaim wanpela nikel leia) i bungim korosen na wear resistens, na dispela i mekim em i gutpela long ol ples we i gat bikpela hat o korosen.
Long sait bilong insulesen, ol i karamapim kopa waia wantaim PVC, XLPE (kros-linked polyethylene), raba o fluoroplastik, na dispela i mekim na em inap long senis long ol kain kain voltej level (long liklik voltej i go long ultra-hai voltej) na ol kondisen bilong envairomen (long drai insait long haus i go long wetpela ausait).