I-Phosphate Coatings Pretreatment for Steel Substrates

I-Phosphate Coatings Pretreatment for Steel Substrates

Ukwelashwa kwangaphambili okwaziwayo kwama-substrates ensimbi ngaphambi nje kokufakwa kwempushana kuyi-phosphating engahluka ngesisindo sokumboza.

Uma sikhulu isisindo sokuguqula ukuguqulwa sikhulu izinga lokumelana nokugqwala elizuziwe; ephansi isisindo enamathela ngcono izakhiwo mechanical.

Ngakho-ke kuyadingeka ukukhetha ukuvumelana phakathi kwezakhiwo zemishini kanye nokumelana nokugqwala. Izisindo eziphakeme ze-phosphate zinganika inkinga i-powder coatings kulokho kuphuka kwekristalu kungenzeka lapho ukunamathela kungaphansi kwamandla emishini asetshenziswa endaweni, isb. ukugoba noma umthelela.

Ngenxa yokunamathela okuhle kakhulu koqweqwe lwempushana embotsheni ye-phosphate, ukuhlukaniswa kuzovame ukwenzeka endaweni esibonakalayo ye-phosphate/metal substrate esikhundleni se-phosphate/powder coating interface.

Izembatho ze-phosphate zimbozwe yi-BS3189/1959, i-Class C ye-zinc phosphate kanye ne-Class D ye-iron phosphate.
I-fine crystalline zinc phosphate iyanconywa ekuhlanganisweni kwesisindo esingu-1-2g/m2 kanye ne-iron phosphate ku-0.3-1g/m2. Isicelo singenziwa ngesifutho noma ngokucwiliswa. Ukudlula i-Chromate ngokuvamile akudingekile.

Izindwangu ze-iron phosphate ngokuvamile zifafazwa ekusebenzeni kwezigaba ezintathu noma ezine. Umsebenzi uvame ukudlula ezingxenyeni ezimbili zokuhlanza amanzi ngaphambi kokoma.

I-Zinc phosphate ingaba isifutho noma idiphu ifakwe ekusebenzeni kwezigaba ezinhlanu, okungukuthi. i-alkali degrease, hlambulula, i-zinc phosphate, ama-rinse amabili amanzi.

Kubalulekile ukuthi i-workpiece ngemuva kwe-phosphating ifakwe impushana ngokushesha ngangokunokwenzeka ngemva kokumiswa.

I-Phosphate Coatings Pretreatment