Mafasteners ndeaya akajairwa zvikamu zvekutanga, anowanzonziwo "standard zvikamu".Kune mamwe mafasteners ane simba rakakwirira uye nemazvo, kurapwa kwepamusoro kwakatonyanya kukosha kupfuura kurapwa kwemafuta.Mhando dzese dzekusungirira dzinoshandiswa muhuwandu hukuru hwemichina michina, dzinenge dzese dzinoda kuunganidzwa mushure mekugadziriswa kwepamusoro, kuitira kuti uwane anticorrosion, kushongedza, kusapfeka kupfeka, kuderedza friction coefficient uye zvimwe zvinokonzeresa, uye inorganic surface treatment electrogalvanizing uye inopisa galvanizing. tekinoroji yekudzivirira yekudzivirira ye cathodic.
Nheyo ye electrogalvanizing steel fastener zvigadzirwa ndeye kushandiswa kwe electrolysis, kuumbwa kweyunifomu, dense, yakanyatsobatanidzwa simbi kana alloy deposition layer pamusoro peiyo workpiece, kuumbwa kwejira rejasi pamusoro pesimbi, kuitira kuti kuwana kuchengetedzwa kwesimbi corrosion process.Naizvozvo, electrogalvanized coating is a directional movement from the positive electrode to negative electrode using current.Zn2+ mu electrolyte ine nucleated, inokura uye yakaiswa pa substrate pasi pechiito chekugona kuumba galvanized layer.Mukuita uku, hapana nzira yekuparadzanisa pakati pe zinc ne iron.Kubva pakuona microscopic, inofanira kuva yakachena zinc layer.Muchidimbu, inopisa dip galvanized iron-zinc alloy layer uye yakachena zingi layer, uye yakavhenekerwa chete chidimbu chezingi rakachena, saka, nesimbi-zinc alloy layer kubva pakuputira inonyanya kuenderana nekuzivikanwa kweiyo nzira yekupfeka, yakakodzera marata fasteners, simbi waya, simbi pombi uye zvimwe zvigadzirwa.Metallographic nzira uye XRD nzira inoshandiswa kuona iyo yekubatisa kusiyanisa electrogalvanizing uye inopisa galvanizing, uye kupa nhungamiro yekutadza kuongorora.
Pane nzira mbiri dzekuziva electrogalvanizing uye inopisa galvanizing coatings.Imwe ndeye metallographic nzira: iyo metallographic nzira haina kuganhurirwa nehuwandu hwemukati uye saizi yemuenzaniso, uye yakakodzera kune ese electrogalvanizing uye inopisa galvanizing zvigadzirwa.Imwe yacho ndeye X-ray diffraction nzira: inoshanda kune dhayamita inopfuura 5mm yekuisa mabhaudhi uye nzungu mundege ine hexagonal;Iyo dhayamita yekunze yakakura kupfuura 8mm simbi pombi pamusoro peradian zvigadzirwa, kuve nechokwadi chekuti sampuli inogona kugadzirwa kuita hudiki saizi ye5mm × 5mm pamusoro flat samples, uye marudzi ese ezvigadzirwa zvekunamira.Inogona kusimbisa chimiro chekristaro cheiyo coating yemukati ≥5% chikamu.Samples ane gobvu kwazvo pure zinc deposits haana kukodzera X-ray diffraction.
electrogalvanizing
inopisa galvanizing coatings
Nguva yekutumira: Sep-15-2022