Kɔbere-kɔla oxidation tumi ne plasticity a ɛwɔ kɔbere abaa mu no ma wonya gyinabea soronko wɔ adansi ho asiesie mu. Ɛnam surface pasivation, tete onyin anaa electroplating akwan so no, wobetumi anya kɔla nsakrae afi kɔkɔɔ a ɛhyerɛn akɔ ahabammono tuntum, na wɔde di dwuma kɛse wɔ ɔdan a ɛkorɔn-awie ntama afasu, adwinni mu ahoni, mfinimfini asiesie nhama ne tebea afoforo mu. Sɛ nhwɛso no, wɔde H68 kɔbere (68% kɔbere ne 32% zinc) na ɛyɛ tokuru-out carved railings a ɛwɔ amammerɛ mu agyiraehyɛde dan pɔtee bi mu denam extrusion molding so. Ɛnyɛ sɛ eyi di nhyehyɛe ahoɔden a wɔhwehwɛ no ho dwuma nko na mmom ɛde retro texture nso ma denam oxidation ayaresa so, na ɛma wonya adansi ho afɛfɛde ne dwumadi a wɔaka abom pɛpɛɛpɛ.
