Ekubunjweni kokwelashwa kwe-metal surface yenqubo yefilimu yesikhumba se-phosphate, kuzokhiqiza inani elikhulu le-phosphate slag, njengokususwa okufika ngesikhathi kwalezi ezimisiwe ezinhlayiyeni ze-slag eziwuketshezi, kuzothinta ukuzinza nokuhlanzeka kwe-tank liquid, ngokuqondile. okuthinta izinga lokufaneleka komkhiqizo.Ngakho-ke, kuyadingeka ukumisa umshini wokukhipha i-phosphating slag othomathikhi emgqeni wokukhiqiza.