Nɛgɛ-kulu oksidan nɔ ani nɛgɛberew ka plastiki bɛ jɔyɔrɔ kɛrɛnkɛrɛnnen di u ma fɛn dilanni masiri siratigɛ la. Surface passivation, antique ageing walima electroplating processes fɛ, kulɛri caman caman cili bɛ se ka kɛ ka bɔ jɛman jɛman na ka taa jɛman dibiman na, wa a bɛ kɛ kosɛbɛ sow rido kogo sanfɛ-banw na, seko ni dɔnko jɛgɛw la, kɔnɔna masirili layiniw na ani ko wɛrɛw la. Misali la, laadala taamasiyɛn boon dɔ ka bɔgɔdaga minnu dilalen don ni dingɛ ye-bɔ, olu dilannen don ni H68 nɛgɛ ye (68% nɛgɛ ani 32% zinki) ka tɛmɛn extrusion molding fɛ. O tɛ dan sigicogo fanga ɲininiw dɔrɔn ma, nka a bɛ retro texture fana jira oksidan furakɛli fɛ, ka se ka fɛn dilanni cɛɲi ni baarakɛcogo faralen ɲɔgɔn kan cogo dafalen na.
