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1.发明授权Solutions for the deposition of protective layers on zinc surfaces and process therefor 失效ZINC表面保护层沉积的方法及其过程
公开(公告)号：US3539403A
公开(公告)日：1970-11-10
申请号：US3539403D
申请日：1967-11-20
Applicant: COLLARDIN GMBH GERHARD
Inventor： RIES CHRISTIAN
CPC classification number: C23C22/34
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公开(公告)号：US3682713A
公开(公告)日：1972-08-08
申请号：US3682713D
申请日：1970-06-25
Applicant: COLLARDIN GMBH GERHARD
Inventor： RIES CHRISTIAN , STOLZENFELS GUNTER
Abstract: A PROCESS FOR APPLYING A PROTECTIVE COATING ON ALUMINUM, ZINC AND IRON UNDER SUBSTANTIALLY INDENTICAL OPERATING CONDITIONS WHICH CONSISTS ESSENTIALY OF APPLYING TO THE METAL SURFACES OF ALUMINUM, ZINC AND IRON OF A COMPLEX FLUORIDE COATING SOLUTION FREE FORM CHROMIC ACID, PHOSPHORIC ACID AND OXALIC ACID HAVING A CONCENTRATION OF FROM 0.1 TO 15 GM. PER LITER, BASED ON THE METAL CONTENT, OF COMPLEX FLUORIDES OF METALS SELECTED FROMTHE GROUP CONSISTING OF BORON, TITANIUM, ZIRCONIUM AND IRON, FROM 0.1 TO 10 GM. PER LITER OF FREE FLUOREDE IONS AND FROM 0.5 TO 30 GM. PER LITER, CALCULATED AS SODIUM M-NITROBENZENE SULFONATE, OF AN OXIDIZING AGENT, AT A PH OF FROM 3.0 TO 6.8 FOR A TIME SUFFICIENT TO FORM A COATING. THE APPLIED COATINGS CNA BE POST-PASSIVATED WITH SOLUTIONS CONTAINING CHROMIC OR PHOSPHOORIC ACIDS.
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3.发明授权
公开(公告)号：US3539402A
公开(公告)日：1970-11-10
申请号：US3539402D
申请日：1967-11-20
Applicant: COLLARDIN GMBH GERHARD
Inventor： RIES CHRISTIAN
CPC classification number: C23C22/34
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