Ko galvanized mota muviri unogona kuora uye nei izvi zvichiitika
Zviri mukati
Galvanizing ine imwe nhanho yekudzivirira - electrochemical. Zinc nesimbi zvinoumba galvanic pair, kureva, pakubata nehunyoro, magetsi emagetsi anotanga kuyerera pakati pavo uye imwe yenhengo dzevaviri inotanga kuparara.
Kana iwe ukasiya chidimbu chesimbi mumhepo yakasununguka, kuguma kwayo kuchava kusuruvara uye kusingadzivisiki: nokukurumidza kana kuti gare gare simbi inotanga kuora uye inoshanduka kuva guruva. Kunonoka kutanga kwekuora uye kunonoka, vagadziri vanoenda kune zvakasiyana-siyana - vanovhara simbi yemuviri ne "sandwich" yakawanda ye mastics, primers, pendi uye varnishes.
Kuti uwedzere kuchengetedza motokari, mamwe makambani emotokari anovhara muviri wose (kana zvikamu zvayo) ne zinc. Asi kana galvanized mota muviri unoora - gare gare mune zvinyorwa zvechinyorwa.
Sei magalvanized parts achinyanya kushingirira pakuora pane simbi isina kujeka
Corrosion ndiko kuita kwesimbi neokisijeni, panguva iyo oxide inoenderana inoumbwa (munyaya yesimbi (simbi) - FeO2, ngura inozivikanwa). Dzimwe simbi dzinosangana neokisijeni - aluminium, mhangura, tini, zingi. Asi anonzi "asina tsvina" nekuti maokisidhi ari pamusoro pawo anoumba firimu rakatetepa, rakasimba iro oksijeni isingachapindi. Nokudaro, zvidimbu zvemukati zvesimbi zvinodzivirirwa kubva pakuora.
Panyaya yesimbi, mamiriro ezvinhu anodzoserwa kumashure - iron oxide inoumba yakasununguka, isina kugadzikana "maflakisi", kuburikidza iyo okisijeni inopinda inobudirira kupinda, muzvikamu zvakadzika. Ichi ndicho musimboti wekudzivirira kurapwa kwesimbi ine zinc: zinc oxide inodzivirira yakavimbika simbi nekuvhara kupinda kweokisijeni. Chiyero chekudzivirira chinoenderana nematanho maviri: nzira yekushandiswa uye kukora kwechidziviriro chekudzivirira.
Kuora muviri sill
Chiyero chakasimba chekudzivirira chinopiwa nekupisa galvanizing - kunyudzwa kwemuviri wemotokari mu zinc yakanyungudutswa. Mhedzisiro yakanaka inoratidzwa nenzira yegalvanic (muviri (kana chikamu chayo) inodzikiswa mu electrolyte ine zinc uye magetsi anopfuudzwa), thermal diffusion galvanizing. Zvinoreva nzira idzi dzose ndezvokuti zinc haingoshandisi chete pamusoro, asiwo inopinda kune imwe yakadzika mukati mesimbi pachayo, iyo inowedzera zvinhu zvekudzivirira zvekuputira.
Galvanizing ine imwe nhanho yekudzivirira - electrochemical. Zinc nesimbi zvinoumba galvanic pair, kureva, pakubata nehunyoro, magetsi emagetsi anotanga kuyerera pakati pavo uye imwe yenhengo dzevaviri inotanga kuparara. Zinc isimbi inoshanda zvakanyanya kupfuura simbi, saka, kana paine kukuvara kwemagetsi (scratch) pane galvanized simbi, iyo zinc inotanga kuparara, uye simbi pachayo inoramba isina kubatwa kwenguva yakati.
Kana galvanized body inoita ngura
Hapana teknolojia yakakwana. Kana galvanized mota muviri unoora, mhinduro haina mubvunzo. Nokukurumidza kana kuti gare gare, ngura inokunda kunyangwe mota yakanyatso galvanized. Uye izvi zvichaitika nokuda kwezvikonzero zviviri.
Kukuvadza kune zinc layer
Chikonzero chakanyanya kujeka chekutanga kwemaitiro ekuora musimbi ine galvanized kukuvara kwemagetsi, iyo inovhura mukana weokisijeni kune simbi isina kudzivirirwa. Kutanga, zinc layer inotanga kuparara, uye ipapo muviri simbi. Nokuda kwechikonzero ichi, vazhinji varidzi vemhando yepamusoro yemotokari (mota dzakadaro dzine zinc coating yakakwirira kwazvo), kunyange mushure mezviitiko zviduku, tsvaka kubvisa motokari nokukurumidza. Zvinokwanisika kugadzirisa muviri wakasvibiswa, kupenda pamusoro uye varnish nzvimbo yekukuvadza mubasa remotokari, asi kudzorera kutendeseka kwezinc layer inogoneka chete mukugadzirwa kwemaindasitiri.
Zinc oxidation
Firimu rezinc oxide rakasimba rinochengetedza simbi kubva pakupinda kweokisijeni. Nekudaro, zinc ichiri kuderera pasi pesimba rehunyoro, makemikari emumugwagwa, uye shanduko yekushisa. Izvi zvinoreva kuti iyo oxide layers inoparadzwa zvishoma nezvishoma, uye zinc yakachena, inopindirana neokisijeni, inoumba zvidimbu zvitsva zvekudzivirira oxide film.
Ngura pamota
Zviri pachena kuti nzira iyi inogona kuenderera kwenguva yakareba, asi kwete nekusingaperi. Munharaunda yemaguta, chiyero chekuparadzwa kwe zinc coating ndeye 6-10 microns pagore. Izvi zvinotsanangura nguva yevimbiso yekupokana kuburikidza nekuora kwakagadzwa nevagadziri: ukobvu hwechidziviriro layer inokamurwa nechiyero chekunyangarika kwayo. Paavhareji, inosvika makore anenge 10-15.
Chii chekuita kana galvanized body yaora
Mhinduro kumubvunzo wekuti galvanized car body rots yakatopiwa pamusoro apa. Kana ngura yatotanga kubata muviri wemotokari, usazeza kushanyira basa rakanaka remotokari. Corrosion process inogona kudzikiswa kana foci yayo ikabatwa nemazvo.
Uye nokuda kwekushanda kusina dambudziko kunze kwenguva ino, zvakakosha kuchengetedza nzvimbo dzisina njodzi (pasi, sills, arches, nezvimwewo) ne anticorrosive agents, kutarisa kuchena kwemotokari (tsvina inobatsira pakuparara kwechidziviriro chekudzivirira), uye bvisa machipisi madiki uye zvikwambo panguva yakakodzera.
