Izinzuzo kanye Nokuhlaziywa Okuqhathanisayo Okubanzi Kwezinqubo Eziyinhloko Zokwelashwa Kwama-surface for Fasteners 

I. Izinqubo Eziyinhloko Zokwelapha Okungaphezulu Kwezinto Zokuzibopha kanye Nezinzuzo Zazo Eziyinhloko

1. I-Electrogalvanizing (Kufaka iZinc Eluhlaza-Omhlophe kanye neZinc Yombala)

I-Electrogalvanizing (i-cold galvanizing) iyinqubo efaka ungqimba lwezinki olufanayo ezindaweni eziyisigaxa nge-electrolysis, etholakala ngezinhlobo ezifana nezinc eluhlaza okwesibhakabhaka nombala we-zinc. Kuyindlela yokwelapha ephansi kakhulu eyamukelwa kabanzi yezibophelelo zentengiso. Izinzuzo zayo eziyinhloko zihlanganisa ubuchwepheshe obuvuthiwe, izindleko eziphansi, ukujiya okulawulwayo okunamathelayo (5-15μm), ukuphela kwendawo ephezulu, kanye nezinketho zemibala eminingi, okuyenza ifanelekele izidingo zokubukeka ezimeni zokukhanya zasendlini ezilwa nokugqwala. Ezixhunyweni ezinosayizi omncane (isb., ngaphansi kwe-M8), i-electrogalvanizing ayivimbi imicu noma izikhala, enikeza ukusebenza okuhle kakhulu kokuhlanganisa, ukutholakala kwemakethe okuphezulu kakhulu, nemijikelezo emifushane yokucubungula.

Kufanele kuqashelwe ukuthi i-electrogalvanizing inengcuphe ethile ye-hydrogen embrittlement futhi isebenza kuphela kuzixhumi ezinobulukhuni obungaphansi kwe-HRC38. Ngaphezu kwalokho, ukusebenza kwayo kwe-anti-corrosion kumaphakathi. Isikhathi sokuhlola isifutho sikasawoti esingathathi hlangothi (NSS) se-electrogalvanizing evamile ngokuvamile amahora angama-24-96, esinganwetshwa sibe ngaphezu kwamahora angu-200 ngemva kokwelashwa ngama-sealant akhethekile, kodwa izindleko zizokwenyuka izikhathi ezingu-5-8 ngokufanele.

2. I-Non-Electrolytic Zinc Flake Coating (Dacromet/DACROMET)

I-Dacromet iwuhlobo olusha lokumboza oluhlanganiswe ikakhulukazi ne-zinc powder, i-aluminium powder, ne-chromic acid, eyakhiwe ngokugcotshwa kwe-dip kanye nokubhaka. Kuyinqubo ekhethwayo yesikhathi eside sokulwa nokugqwala ezindaweni ezinokhahlo, enezinzuzo eziyinhloko ezivelele: akukho bungozi be-hydrogen embrittlement, okuyenza ifanelekele izinsimbi eziqinile; ukumelana nokugqwala okuhle kakhulu, okunobude besikhathi sokuhlola isifutho sikasawoti esingathathi hlangothi (NSS) samahora angama-500-800 ungqimba olulodwa namahora ayi-1500-2000 ongqimba oluphindwe kabili, kanye nokumelana okuhle kwezinga lokushisa (isikhathi eside ≤250℃); ukulawulwa kokusebenza kokungqubuzana okunembile, okuqinisekisa ukuvumelana kwamandla okubamba ekuxhumekeni okubalulekile futhi kulungele izimo ezinezidingo eziphezulu zobuqotho bokuxhuma.

Ukungalungi kwayo ukuguquguquka okungalungile kuzifaniso zosayizi omncane ngaphansi kwe-M8 noma izinsimbi ezifakwe ngaphakathi kwedrayivu, njengoba ukugqoka kungase kuthinte ukuhlangana; Ileveli yezindleko ezimaphakathi, ukutholakala kwemakethe evamile, kanye ne-Dacromet yendabuko iqukethe i-chromium ene-hexavalent, ngakho-ke ukuthobela imvelo kudinga ukunakwa.

3. I-Hot-Dip Galvanizing

I-Hot-dip galvanizing iyinqubo yokulinganisa yezimo zangaphandle ezisindayo zokulwa nokugqwala, ukwakha ukunamathela ngokucwilisa izinsimbi ku-zinc encibilikisiwe ku-440-460℃. Izinzuzo zayo eziyinhloko ukunamathela okuqinile (50-100μm), ukunamathela okuqinile kakhulu, nokumelana nokulimala okuhle kakhulu. Ngisho noma imihuzuko ivela phezulu, ingaqhubeka nokumelana nokugqwala ngomphumela womhlatshelo we-anode we-zinc, ubude besikhathi be-NSS bamahora angu-300-1000 ngemva kokudlula. Le nqubo inezindleko ezimaphakathi, ukutholakala kahle kwemakethe, kanye nengozi ephansi ye-hydrogen embrittlement yezixhumi ezinamandla, okuyenza isetshenziswe kabanzi ezingxenyeni zesakhiwo sangaphandle.

Imikhawulo yayo iwukuqedwa kahle kwendawo, ayifanele izimo zokuhlangana ezinembayo; izinsimbi ezinezintambo ezinosayizi omncane ngaphansi kwe-M8 zidinga ukuthepha okwesibili ngemva kokwelashwa, okuthinta ukusebenza kahle; futhi inqubo yokucubungula ingabangela izinguquko zokuqina kokuqina, ngakho-ke akuvunyelwe ukusetshenziselwa izingxenye ze-12.9-grade noma i-alloy steel grade.

4. Ukwelashwa kwe-Black oxide (Blueing).

Ukwelashwa kwe-Black oxide (blueing) kwakha ifilimu ye-iron tetroxide (Fe₃O₄) ewugqinsi engu-1-3μm endaweni yokubopha ngokusebenzisa i-oxidation yezinga lokushisa eliphezulu. Izinzuzo zayo eziyinhloko izindleko eziphansi kakhulu, imijikelezo emifushane yokucubungula, futhi azikho umthelela ekunembeni kwe-fastener dimensional, okuyenza ifanelekele ukuvimbela ukugqwala okuyisisekelo kwezingxenye ezinemba eliphansi ezindaweni ezingaphakathi endlini ezingagqwali. Le nqubo ayidingi i-electroplating, ayibangeli ubungozi be-hydrogen embrittlement, futhi isebenza njengenketho yokonga ezingxenyeni ezingaveziwe njengezingxenye zokudlulisa zangaphakathi zamathuluzi omshini kanye nezingxenye zokuxhuma zezisekelo zamathuluzi.

Ukusebenza kwayo kwe-anti-corrosion kuyinto ebuthakathaka kakhulu, enesikhathi sokuhlola isifutho sikasawoti esingathathi hlangothi samahora angu-4-24 kuphela, esinganwetshwa sibe amahora angu-48-72 ngemva kokuvalwa kokucwiliswa kwamafutha, sihlangabezana nezidingo eziyisisekelo zokuvimbela ukugqwala, futhi isicwebezelisi esingaphezulu siphansi, asinayo impahla yokuhlobisa.

II. Ukuqhathaniswa Okuvundlile Kokusebenza Okubalulekile Kwezinqubo Eziyinhloko

Ukuze uthole iseluleko esenziwe ngendlela oyifisayo, ukubonisana nochwepheshe kunconywa.