ASTM A179oyi adọta enweghị nkebi carbon ígwè anwụrụa na-ejikarị na mpaghara dị iche iche nke ụlọ ọrụ metal, tumadi mgbe nchara nchara nchara na-emikpu na 440 ~ 460℃ngwọta zinc na-agbaze, nke mere na nchara nchara na-ejikọta ya na oyi akwa zinc, nke na-arụ ọrụ nchekwa.Nke a bụ ụzọ dị irè nke corrosion metal, ojiji nke isi ihe bụ ihe ndị a:
(1) ASTM A179 oyi adọta ndị na-emepụta ọkpọkọ na-emepụta ọkpọkọ nwere nnukwu akwa zinc oyi akwa kpuchie na oyi akwa tube na-enweghị ntụpọ, ọ nwere ike izere matrix tube na-enweghị ntụpọ na kọntaktị ọ bụla na ngwọta corrosion iji chebe matrix ígwè site na corrosion.N'ozuzu ikuku, elu nke zinc oyi akwa na-etolite a oyi akwa nke mkpa na ok zinc oxide elu, ọ na-esi ike igbari na mmiri, otú ígwè matrix na-arụ ọrụ nchebe.Ọ bụrụ na zinc oxide na akụkụ ndị ọzọ nke ikuku na-emepụta nnu zinc na-adịghị edozi, mmetụta mgbochi corrosion na-achọsi ike karị.
(2) Na ígwè - zinc alloy oyi akwa, jikọtara ya na ok, na pụrụ iche mgbochi corrosion na mmiri ikuku na ikuku ikuku.
(3) ASTM A179 oyi adọta ọkpọkọ enweghị nkebi nke nwere ike iyi ike n'ihi nchikota nke siri ike, zinc - iron miscible.
(4) Ebe ọ bụ na zinc nwere ezigbo ductility, ya alloy oyi akwa na ígwè isi na-ejikọta ya na ihe siri ike, ya mere akụkụ ndị na-ekpo ọkụ na-ekpo ọkụ nwere ike ịdị oyi, na-atụgharị, ịbịaru, na-ehulata na ịkpụzi ndị ọzọ na-enweghị mmebi nke mkpuchi.
(5) Hot-mikpu galvanized structural ígwè ọkpọkọ, Ẹkot ihe annealing ọgwụgwọ, nwere ike n'ụzọ dị irè melite n'ibu Njirimara nke ígwè matriks iji kpochapụ ígwè na-akpụ ịgbado ọkụ nchegbu, na-eme ka ígwè Ọdịdị maka mbịne.
(6) N'elu oyi adọta enweghị nkebi ọkpọkọ mgbe ọkụ galvanized na-egbuke egbuke ma mara mma.
(7) Dị ọcha zinc oyi akwa bụ ndị kasị na-ekpo ọkụ galvanized oyi akwa nke galvanized oyi akwa, ya ọdịdị bụ ihu ọma nso dị ọcha zinc, na ductility, n'ihi ya, ọ juputara na mgbanwe.
Oge nzipu: Ọktoba 30-2019