Ahụ ụgbọ ala galvanized nwere ike ire ere na gịnị kpatara nke a ji eme
Ihe
Galvanizing nwere ọkwa nchebe ọzọ - electrochemical. Zinc na ígwè na-etolite otu ụzọ galvanic, ya bụ, mgbe ha na-akpakọrịta na mmiri, ọkụ eletrik na-amalite ịbata n'etiti ha na otu n'ime ndị òtù abụọ ahụ na-amalite ịdaba.
Ọ bụrụ na ị hapụ otu mpempe ígwè na mbara igwe, akara ya ga-abụ ihe mwute na ihe a na-apụghị izere ezere: n'oge na-adịghị anya, ígwè ahụ ga-amalite ire ere ma ghọọ ájá. Iji gbuo oge mmalite nke usoro mmebi ahụ ma mee ka ọ kwụsịlata, ndị na-emepụta ụgbọala na-aga aghụghọ dị iche iche - ha na-ekpuchi metal nke ahụ na multilayer "sanwichi" nke mastics, primers, paints na varnishes.
Iji chekwaa ụgbọ ala ahụ ọzọ, ụfọdụ ụlọ ọrụ ụgbọ ala na-eji zinc kpuchie ahụ dum (ma ọ bụ akụkụ ya). Ma ma galvanized ụgbọ ala ahụ rots - mgbe e mesịrị na ederede nke isiokwu.
Kedu ihe kpatara akụkụ galvanized na-eguzogide corrosion karịa nchara nkịtị
Corrosion bụ mmeghachi omume nke ọla na oxygen, n'oge a na-emepụta oxide kwekọrọ (n'ihe gbasara ígwè (steel) - FeO2, nchara a ma ama). Ọla ndị ọzọ na-emeghachi omume na oxygen - aluminum, ọla kọpa, tin, zinc. Mana a na-akpọ ha "igwe anaghị agba nchara" n'ihi na oxides dị n'elu ha na-emepụta ihe nkiri dị gịrịgịrị ma na-adịgide adịgide nke ikuku oxygen na-esikwaghị esi na ya banye. Ya mere, a na-echebe akwa dị n'ime nke ígwè ahụ site na mmebi.
N'ihe banyere ígwè, ọnọdụ ahụ na-atụgharị - ígwè oxide na-etolite na-atọ ụtọ, "flakes" na-ejighị n'aka na-arụ ọrụ nke ọma, bụ nke ikuku oxygen na-abanye n'ihu na-aga n'ihu, n'ime ala dị omimi karị. Nke a bụ ihe dị mkpa nke ọgwụgwọ nchebe nke ígwè na zinc: zinc oxide na-echebe nke ọma na ígwè site na igbochi ohere nke oxygen. Ogo nke nchebe na-adabere na paramita abụọ: usoro ntinye na ọkpụrụkpụ nke oyi akwa mkpuchi.
Sill ahụ na-ere ere
A na-enye ogo kachasị ike nke nchebe site na galvanizing na-ekpo ọkụ - imikpu nke ahụ ụgbọ ala na zinc gbazere. A na-egosipụta nsonaazụ dị mma site na usoro galvanic (ahụ (ma ọ bụ akụkụ ya) na-agbada n'ime electrolyte nwere zinc na ọkụ eletrik na-agafe), ịgbasa ọkụ ọkụ. Ihe ụzọ ndị a niile pụtara bụ na ọ bụghị naanị na a na-etinye zinc n'elu, kamakwa ọ na-abanye n'ime omimi nke nchara n'onwe ya, nke na-eme ka ihe nchebe nke mkpuchi ahụ dịkwuo elu.
Galvanizing nwere ọkwa nchebe ọzọ - electrochemical. Zinc na ígwè na-etolite otu ụzọ galvanic, ya bụ, mgbe ha na-akpakọrịta na mmiri, ọkụ eletrik na-amalite ịbata n'etiti ha na otu n'ime ndị òtù abụọ ahụ na-amalite ịdaba. Zinc bụ ígwè na-arụsi ọrụ ike karịa ígwè, ya mere, ọ bụrụ na mmebi nke ígwè ọrụ (nyochaa) na ígwè galvanized, ọ bụ zinc na-amalite ịkụda, na nchara n'onwe ya na-anọgide na-emetụghị ya ruo oge ụfọdụ.
Mgbe galvanized ahu nchara
Ọ nweghị teknụzụ zuru oke. Ma ahụ ụgbọ ala nke galvanized ọ na-ere ere, azịza ya enweghị mgbagha. Mee elu mee ala, corrosion ga-emeri ọbụna ụgbọ ala galvanized kacha kpachara anya. Na nke a ga-eme n'ihi ihe abụọ.
Mmebi nke oyi akwa zinc
Ihe kacha pụta ìhè maka mmalite nke usoro corrosion na metal galvanized bụ mmebi nke ígwè ọrụ, nke na-emepe ohere ịnweta oxygen na ígwè na-enweghị nchebe. Nke mbụ, akwa akwa zinc ga-amalite ịkụda, mgbe ahụ, metal ahụ. N'ihi nke a, ọtụtụ ndị nwe ụdị ụgbọ ala adịchaghị (ụgbọ ala ndị dị otú ahụ nwere mkpuchi zinc dị oke elu), ọbụlagodi mgbe obere ihe mberede gasịrị, na-achọ iwepụ ụgbọ ala ozugbo enwere ike. Ọ ga-ekwe omume idozi anụ ahụ na-adịghị mma, agba agba na varnish ebe mmebi na ọrụ ụgbọ ala, mana iji weghachite iguzosi ike n'ezi ihe nke akwa akwa zinc ga-ekwe omume naanị na mmepụta mmepụta ihe.
Zinc oxidation
Ihe nkiri zinc oxide siri ike na-echebe nke ọma na igwe ahụ pụọ na ntinye oxygen. Agbanyeghị, zinc ka na-emebi emebi n'okpuru mmetụta nke mmiri, kemịkalụ ụzọ, na mgbanwe okpomọkụ. Nke a pụtara na oxide n'ígwé ji nwayọọ nwayọọ na-ebibi, na zinc dị ọcha, na-emeghachi omume na oxygen, na-etolite ọhụrụ n'ígwé nke nchebe oxide film.
Nchara na ụgbọ ala
O doro anya na usoro a nwere ike ịga n'ihu ruo ogologo oge, ma ọ bụghị ruo mgbe ebighị ebi. N'ime obodo mepere emepe, ọnụego mbibi nke mkpuchi zinc bụ 6-10 microns kwa afọ. Nke a na-akọwa oge nkwenye megide site na corrosion nke ndị na-emepụta na-emepụta: a na-ekewa ọkpụrụkpụ nke oyi akwa mkpuchi site na ọnụego nke efu ya. Ná nkezi, ọ na-apụta ihe dị ka afọ 10-15.
Ihe ị ga-eme ma ọ bụrụ na ahụ galvanized rere ere
Azịza nye ajụjụ nke ma ụgbọ ala galvanized rots ka enyelarị n'elu. Ọ bụrụ na nchara amalitela ijide ahụ ụgbọ ala, ị gaghị egbu oge ịga leta ezigbo ọrụ ụgbọ ala. Enwere ike ibelata usoro nrụrụ aka ma ọ bụrụ na a na-emeso ihe ndị dị na ya nke ọma.
Na maka ọrụ na-enweghị nsogbu n'èzí oge a, ọ dị mkpa iji chebe ebe ndị na-adịghị ike (ala, sills, arches, wdg) na ndị na-ahụ maka ihe mgbochi, nyochaa ịdị ọcha nke ụgbọ ala (unyi na-enye aka na mmebi nke mkpuchi nchebe), na kpochapụ obere ibe na ncha n'oge.
