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1.发明授权Method of removing copper deposits from ferrous metal surfaces using hydroxyalkyl thiourea 失效使用羟基甲基硫脲从金属表面除去铜沉积物的方法
公开(公告)号：US3579447A
公开(公告)日：1971-05-18
申请号：US3579447D
申请日：1968-09-30
Applicant: RICHARDSON CO
Inventor： MUZYCZKO THANDDEUS M , LUDWIG WILLIAM J , LOBODA JON A , SHORE SAMUEL
IPC: C23G1/08 , C02B5/06 , C07C157/02 , C23G1/06
CPC classification number: C23G1/08
Abstract: REMOVAL OF COPPER-CONTAINING INCRUSTATIONS FROM FERROUS METAL SURFACES ACCOMPLISHED IN IMPROVED MANNER BY ADDITION OF A HYDROXYALKYL THIOUREA HAVING AT LEAST TWO CARBON ATOMS IN THE ALKYL GROUP SUCH AS 1-HYDROXYETHYL-3METHYL THIOUREA TO AN AQUEOUS TREATING SOLUTION AND SUBSEQUENT TREATMENT OF FERROUS METAL SURFACES WHEREIN REDUCED SLUDGE FORMATION ACCOMPLISHES REMOVAL OF COPPER AND THE AVOIDANCE OF COPPER PLATING.
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