Ruvara rwakaputirwa simbi ndiro inonziwo organic coated steel ndirokana pre-coated simbi ndiro. Senzira inoenderera yekugadzira yemakoiri, mavara esimbi mahwendefa anogona kukamurwa kuita nzira mbiri: electro-galvanized uye inopisa-dip galvanized.
Panguva imwecheteyo, electro-galvanizing inzira yekugadzira pendi yegoridhe-"layer zinc metal kana zinc alloy" kuburikidza ne electroplating.
Hot-dip galvanizing, inozivikanwawo sehot-dip galvanizing, ndeyekunyika zvigadzirwa zvesimbi zvinoda kugadziriswa musimbi yakanyungudutswa yezinc kuti itaridzike yekunamira kwesimbi. Kuenzaniswa ne electroplating, iyo simbi inopisa-dip coating yakanyanya; pasi pemhoteredzo imwe cheteyo, ine upenyu hurefu.
Kuora kweiyo inopisa-dip galvanized layer pamusoro pesimbi yakaenzana neiyo zinc yakachena. Kuora kwezingi mumhepo kwakafanana nekuora kwesimbi pasi pemamiriro ekunze. Kemikari oxidation corrosion inoitika, electrochemical corrosion inoitika pane zinc pamusoro, uye mvura firimu condensation inoitika. Mumhepo isina kwayakarerekera kana isina kusimba asidhi, zvigadzirwa zvekuora zvinoumbwa nesimbi yakanyungudutswa zvinosanganiswa zvisinganyunguriki (zinc hydroxide, zinc oxide, uye zinc carbonate). Zvigadzirwa izvi zvinopatsanurwa nekuisa uye kugadzira yakatsetseka yakaonda layer.
Kazhinji inogona kusvika pakukora kwe8μm”. Iri rudzi rwefirimu rine humwe hukobvu, asi haisi kungonyungudika mumvura, uye ine kunamatira kwakasimba. Naizvozvo, inogona kutamba chipingamupinyi pakati pemhepo uye galvanized sheet. Dzivirirai imwezve ngura. Iyo galvanized layer yakakuvadzwa panguva yekugadzirisa, uye chikamu chesimbi chepamusoro chinoratidzwa kumhepo.
Panguva ino, zinc nesimbi zvinoumba bhatiri diki. Iko kugona kwe zinc kwakanyanya kuderera pane iyo yesimbi. Seanode, zinc ine yakakosha anode kugadzirisa mhedzisiro pane simbi ndiro substrate kudzivirira ngura yesimbi ndiro.
Colour-coated board imhando yekuputira mvura, iyo inoshandiswa kuchenesa simbi pamusoro nebhurashi kana roller. Mushure mekupisa uye kuporesa, firimu yepende ine hupamhi hwakafanana inogona kuwanikwa.
Nguva yekutumira: Nov-02-2021