Ngesikhathi sokusetshenziswa, izingxenye zensimbi zijwayele ukugqwala kwe-electrochemical kanye nokugqwala kwamakhemikhali ngenxa yethonya lendawo yokusebenza. Kuvamile ezinhlelweni zezimboni ukuthuthukisa izakhiwo ezingaphezulu zezingxenye zokusebenza ngobuchwepheshe bokwelapha obungaphezulu kanye nokuthuthukisa izakhiwo zokulwa nokugqwala kweziqephu zokusebenza. Lolu daba lwethula ubuchwepheshe obubili obungaphezulu obunezinto ezinhle kakhulu zokunqanda ukugqwala: ubuchwepheshe bokwelashwa kwe-Dacromet

Ubuchwepheshe bokwelashwa kwe-Dacromet surface bubuchwepheshe bokwemboza obunqanda ukugqwala, obusetshenziselwa ikakhulukazi ukuvikela indawo yemikhiqizo yensimbi. Isebenzisa indlela yokucwenga engenawo ugesi ukuze imboze ngokulinganayo indawo engaphezulu yensimbi ngongqimba lwe-inorganic coating enezakhiwo zokunqanda ukugqwala. Izinga lokushisa elivamile lokucubungula liba ngu-300°C. Lokhu kufakwa ikakhulukazi kwakhiwe i-ultrafine flaky zinc, i-aluminium ne-chromium, engathuthukisa ngempumelelo ukumelana nokugqwala kwemikhiqizo yensimbi futhi yandise impilo yabo yesevisi. Inqubo ye-Dacromet ingenza ungqimba lwefilimu oluminyene lwe-4 ~ 8 μm ebusweni bomsebenzi wokusebenza. Ngenxa yezendlalelo ezigqagqene ze-flake zinc ne-aluminium, ivimbela imidiya ebolayo njengamanzi nomoya-mpilo ukuthi ingathintani nezingxenye zensimbi. Ngesikhathi esifanayo, ngesikhathi sokucutshungulwa kwe-Dacromet, i-chromic acid iphendula ngamakhemikhali nge-zinc, i-aluminium powder kanye nesisekelo sensimbi ukuze kwakhiwe ifilimu ejulile ye-passivation, enokumelana okuhle nokugqwala.

Ngokuvamile, ubuchwepheshe bokwelashwa kwe-Dacromet surface buyindlela evamile yokwelapha ubuso bensimbi. Ubuchwepheshe be-Dacromet busetshenziselwa ikakhulukazi ukuvikela ukubola, ikakhulukazi izikulufu nezinsimbi. Isetshenziswa kabanzi ukuthuthukisa ubulukhuni nokuqina kwemikhiqizo yensimbi. I-abrasiveness kanye nokumelana nokugqwala. Ezindaweni zokusebenza ezinobulukhuni kanye nezidingo zokunqanda ukugqwala, ubuchwepheshe beCrow busebenza kakhulu. Lapho ukhetha ubuchwepheshe obufanele bokwelashwa kwendawo, budinga ukukhethwa ngokuya ngezidingo ezithile zohlelo lokusebenza.

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