Non-chromate corrosion inhibitors for aluminum alloys
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09D-005/08
C08L-075/00
출원번호
US-0329613
(1999-06-10)
발명자
/ 주소
Lewis Kathrine J.
Aklian Jak
출원인 / 주소
PRC-DeSoto International, Inc.
대리인 / 주소
Gifford, Krass, Groh, Sprinkle, Anderson & Citkowski, P.C.
인용정보
피인용 횟수 :
18인용 특허 :
66
초록▼
A non-chromate, corrosion-inhibiting coating composition for metal surfaces includes at least one inhibitor selected from the group consisting of phosphates, phosphosilicates, silicates, and mixtures thereof, at least one inhibitor selected from the group consisting of titanates, zinc salts, and mix
A non-chromate, corrosion-inhibiting coating composition for metal surfaces includes at least one inhibitor selected from the group consisting of phosphates, phosphosilicates, silicates, and mixtures thereof, at least one inhibitor selected from the group consisting of titanates, zinc salts, and mixtures thereof, and a carrier for these inhibitors, the carrier capable of placing the inhibitors in proximity with the metal surface. In a preferred embodiment, the coating composition further includes a borate such as boric acid, and a succinate. A preferred phosphate includes calcium dihydrogen phosphate, and sodium titanium oxide is a preferred titanate. The zinc salt can include zinc phosphate or zinc cyanamide.
대표청구항▼
[ We claim:] [1.] A nonchromate, corrosion-inhibiting coating composition for a metal surface, said composition containing inhibitors, said inhibitors comprising:a synergistic amount of at least one compound selected from the group consisting of boric acid and salts thereof; dipotassium monohydrogen
[ We claim:] [1.] A nonchromate, corrosion-inhibiting coating composition for a metal surface, said composition containing inhibitors, said inhibitors comprising:a synergistic amount of at least one compound selected from the group consisting of boric acid and salts thereof; dipotassium monohydrogen phosphate; calcium dihydrogen phosphate; ammonium dihydrogen phosphate; sodium dihydrogen phosphate; potassium dihydrogen phosphate; sodium pyrophosphate; calcium, strontium phosphosilicate; calcium, strontium, zinc phosphosilicate; tetrasodium orthosilicate; and mixtures thereof;a synergistic amount of at least one compound selected from the group consisting of: sodium titanium oxide, an inorganic zinc compound and an organo-zinc compound wherein the organo-zinc compound is selected from the group consisting of:EQU Zn[L(CR.sub.1 R.sub.2).sub.n CH.sub.3 ].sub.2 rein L is selected from carboxyl, hydroxyl, sulfonyl, phosphyl, phosphonyl, sulfinyl, amino, cyano, imino, mercapto, nitro, nitroso, siloxy, sulfamino and sulfamyl; R.sub.1 and R.sub.2 are each independently hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 heteroatom containing alkyl, hydroxyl, carboxyl, and amino; n is an integer between 0 and 18 inclusive, mono-unsaturated analogs thereof, di-unsaturated analogs thereo fEQU Zn[L--(CR.sub.3 R.sub.4).sub.m --L'] rein L and L' are each independently selected from carboxyl, hydroxyl, sulfonyl, phosphyl, phosphonyl, sulfinyl, amino, cyano, imino, mercapto, nitro, nitroso, siloxy, sulfamino and sulfamyl; m is an integer between 1 and 8 inclusive; R.sub.3 and R.sub.4 are each independently selected from a group consisting of: hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 heteroatom containing alkyl, carboxyl, hydroxyl, sulfonyl, phosphyl, phosphonyl, sulfinyl, amino, cyano, imino, mercapto, nitro, nitroso, siloxy, sulfamino and sulfamyl, zinc (EDTA) complexes, and zinc containing polymer; andan effective film-forming amount of a carrier for said inhibitors, said carrier capable of placing said inhibitors in proximity with said metal surface.
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