C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/36 (2006.01) C23C 22/12 (2006.01) C23C 22/73 (2006.01) C23C 22/86 (2006.01)
Patent
CA 2194910
To prevent the deterioration in water-resistant secondary adherence that occurs during prolonged use of a fluoride-containing phosphate conversion coating liquid composition to form a conversion coating on metal surfaces that are at least partly aluminiferous, the aluminum compound-containing sludge produced in the phosphate conversion coating liquid composition as it is used is coagulated and sedimented by adding at least one cationic polymeric coagulant to the sludge-containing phosphate conversion coating liquid composition.
En vue d'empêcher la détérioration de l'adhérence secondaire résistante à l'eau qui survient en cas d'utilisation prolongée d'une composition liquide de phosphatation par conversion, contenant des fluorures, servant à phosphater par conversion des surfaces métalliques au moins partiellement aluminifères, la boue contenant le composé d'aluminium qui se forme dans ladite composition pendant son utilisation est coagulée et sédimentée du fait de l'adjonction à cette même composition d'au moins un coagulant cationique polymère.
Aizawa Kenji
Okabayashi Yutaka
Borden Ladner Gervais Llp
Henkel Corporation
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