1. Chrome plating pamwamba kuti asamavale;
2. Mabowo otayirira amakutidwa ndi chromium kuti apititse patsogolo kusungirako mafuta ndikufulumizitsa kuthamanga;
3. Lolemba pamwamba pamwamba kusintha elasticity;
4. Malo osungiramo mafuta amaperekedwa kunja kwa mphete kuti athetse mafuta;
5. Kunja kwa mpheteyo kumakutidwa ndi mkuwa kuti athandizire kuthamanga;
6. Molybdenum amapopera pamwamba pa mphete kuti achepetse kumamatira ndi kuvala.

Mwachidule motere:
Sinthani kukana kuvala: chrome plating, nitriding
Kupititsa patsogolo magwiridwe antchito oyambira: plating yamkuwa, phosphating, sulfurizing
Kupewa zomatira kuvala: kupopera molybdenum