Enwere ike kewaa ụkpụrụ nbibi nke ọla ụzọ abụọ: corrosion zuru oke na corrosion mpaghara.Na localized corrosion nwere ike kewaa: pitting corrosion, crevice corrosion, galvanic njikọ corrosion, intergranular corrosion, nhọrọ corrosion, nchekasị corrosion, corrosion ike ọgwụgwụ na eyi corrosion.
Comprehensive corrosion e ji corrosion uniformly kewara n'elu nke metal, nke mere na metal n'ozuzu thinning.Comprehensive corrosion na-apụta n'okpuru ọnọdụ na ihe na-emebi emebi nwere ike iru n'akụkụ niile nke elu igwe n'otu n'otu, na nhazi na nhazi nke ígwè ahụ dị ntakịrị.
Pitting corrosion, makwaara dị ka obere oghere corrosion, bụ ụdị corrosion etinyere na a nnọọ obere nso nke metal elu na miri n'ime metal esịtidem pore-dị ka corrosion ụkpụrụ.
Ọnọdụ corrosion n'ozuzu na-ezute ihe, ọkara na ọnọdụ electrochemical:
1, pitting n'ozuzu na-emekarị na mfe passivation nke metal elu (dị ka igwe anaghị agba nchara, aluminum) ma ọ bụ elu nke metal na cathodic plating.
2, pitting na-eme n'ihu ion pụrụ iche, dị ka halogen ion na ọkara.
3, corrosion pitting na-eme n'otu ikike dị oke egwu dị n'elu, nke a na-akpọ ikike pitting ma ọ bụ mgbawa.
Intergranular corrosion bụ ihe ọla n'ime otu ihe na-emebi emebi n'akụkụ oke ọka ma ọ bụ oke ọka dị nso na corrosion, nke mere na mfu nke njikọta n'etiti ọka nke ihe nrụrụ.
Nhọrọ nke corrosion na-ezo aka na ihe ndị na-arụsi ọrụ ike n'ime ọtụtụ alloys nke ọma gbazere, usoro a na-akpata site na ọdịiche electrochemical na ngwongwo alloy.
Crevice corrosion bụ ọnụnọ nke electrolyte n'etiti metal na metal na metal na-abụghị metal mejupụtara a warara oghere, Mbugharị nke na-ajụ na-egbochi mgbe a localized corrosion steeti.
Nhazi nke crevice corrosion:
1, njikọ n'etiti dị iche iche structural components.
2, na elu igwe nke nkwụnye ego, ihe mgbakwunye, mkpuchi na ngwaahịa corrosion ndị ọzọ dị.
Oge nzipu: Mar-15-2024