Process for reducing contaminants on surfaces of die cast component
摘要
A process of cleaning a component following a forming operation that has left a residue on the component surface. The process comprises a thermal treatment during which the surface of the component is subjected to a controlled open flame, preferably in the presence of a limited amount of excess oxygen. Residues can be removed by the open flame to the extent that adhesion of a coating to the component surface can be greatly enhanced. Surface residue levels prior to the thermal treatment can be reduced by the use of lubricants prepared by diluting with de-ionized water or reverse osmosis water, thereby further increasing the likelihood of a residue-free surface having optimal adhesion properties. Under some circumstances, residue levels can be sufficiently reduced with the use of lubricants diluted with de-ionized or reverse osmosis water such that the thermal treatment can be omitted.
申请公布号
EP1344591(A2)
申请公布日期
2003.09.17
申请号
EP20030075648
申请日期
2003.03.05
申请人
DELPHI TECHNOLOGIES, INC.
发明人
O'CONNOR, KURT F.;BEAM, MARY A.;HOUK, LARRY W.;HYMAN, LARRY G.;FERRARO, DEREK S.;SANFTLEBEN, HENRY M.;PLATT, SAMUEL B.