Phosphate Coatings Pretreatment for Steel Substrates

Phosphate Coatings Pretreatment for Steel Substrates

Phekolo e tsebahalang ea pele bakeng sa li-substrates tsa tšepe pele ho ts'ebeliso ea phofo ke phosphating e ka fapanang ka boima ba ho roala.

Ha boima ba 'mele oa ho sokoloha bo ntse bo eketseha, ho na le tekanyo e kholo ea ho hanyetsa kutu e fihletsoeng; ho theola boima ba ho roala ho ntlafatsa thepa ea mechine.

Ka hona hoa hlokahala ho khetha ho sekisetsa pakeng tsa thepa ea mechine le ho hanyetsa kutu. Boima ba ho roala phosphate bo phahameng bo ka baka mathata liaparo tsa phofo ka hore kristale fracture ka etsahala ha barbotage e tlas'a sebakeng sa heno sebelisoa matla a mechine, mohlala. kobeha kapa tshusumetso.

Ka lebaka la ho khomarela hantle ha phofshoana ea phofshoa ho seaparo sa phosphate, hangata ho arohana ho tla etsahala ho sebopeho sa phosphate / metal substrate ho e-na le sebopeho sa ho roala phosphate / phofo.

Liaparo tsa phosphate li koahetsoe ke BS3189/1959, Sehlopha sa C sa phosphate ea zinki le Sehlopha sa D bakeng sa phosphate ea tšepe.
Ho khothalletsoa lijo-thollo tse ntle tsa crystalline zinki phosphate ha ho koaheloa boima ba 1-2g/m2 le bakeng sa phosphate ea tšepe ho 0.3-1g/m2. Kopo e ka etsoa ka ho fafatsa kapa ho qoelisoa. Chromate passivation hangata ha e hlokahale.

Liaparo tsa tšepe tsa phosphate hangata li fafatsoa ts'ebetsong ea mekhahlelo e meraro kapa e mene. Hangata mosebetsi o feta likarolong tse peli tsa ho hlatsoa metsi pele o omisoa.

Zinc phosphate e ka fafatsoa kapa e qoelisoa tšebetsong ea mekhahlelo e mehlano, ke hore. alkali degrease, rinse, zinki phosphate, lirinse tse peli tsa metsi.

Ho bohlokoa hore workpiece ka mor'a phosphating e koahetsoe ka phofo kapele kamoo ho ka khonehang ka mor'a ho omisa.

Phosphate Coatings Pretreatment