I-Phosphate Coatings Pretreatment for Steel Substrates

I-Phosphate Coatings Pretreatment for Steel Substrates

Unyango lwangaphambili olwamkelwayo lwe substrates zentsimbi nje phambi kokusetyenziswa komgubo yiphosphating enokwahluka kubunzima bokugquma.

Ubukhulu bobunzima bokugquma kokukhona bukhulu iqondo lokuxhathisa umhlwa okuphunyeziweyo; okungaphantsi kobunzima bokugquma bhetele iimpawu zomatshini.

Ngoko ke kuyimfuneko ukukhetha ukuhambelana phakathi kweempawu zomatshini kunye nokumelana nokubola. Ubunzima bokugquma iphosphate ephezulu bunokunika ingxaki Ipeyinti kuloo crystal fracture ingenzeka xa ukutyabeka kuphantsi kwamandla omatshini asetyenziswa ekuhlaleni, umz. ukugoba okanye impembelelo.

Ngenxa yokuncamathela okugqwesileyo komgubo wokwaleka kwi-phosphate yokwaleka, ukuchithwa kuya kwenzeka ngokuqhelekileyo kwi-phosphate/metal substrate interface kunokuba kujongano lwe-phosphate/powder yokwambathisa.

Iingubo ze-phosphate zihlanganiswe yi-BS3189 / 1959, i-Class C ye-zinc phosphate kunye ne-Class D ye-iron phosphate.
I-fine grain crystalline zinc phosphate iyanconywa kwi-coating weights ye-1-2g / m2 kunye ne-iron phosphate kwi-0.3-1g / m2. Ukusetyenziswa kunokwenziwa ngesitshizi okanye ukudipha. I-chromate passivation ayidli ngokuba yimfuneko.

Iingubo ze-iron phosphate zikholisa ukutshizwa kumanqanaba amathathu okanye amane. Umsebenzi udla ngokudlula kumacandelo amabini okuhlamba amanzi ngaphambi kokuba womiswe.

I-zinc phosphate inokutshizwa okanye idiphu igalelwe kwinqanaba elihlanu, oko kukuthi. i-alkali degrease, i-rinse, i-zinc phosphate, iirinse ezimbini zamanzi.

Kubalulekile ukuba i-workpiece emva kwe-phosphating ibe ngumgubo ngokukhawuleza emva kokumisa.

I-Phosphate Coatings Pretreatment