Process for metal cleaning

Details Process for metal cleaning Process for metal cleaning

C - Chemistry, Metallurgy

23

G

C23G 1/06 (2006.01) C23G 1/08 (2006.01) C23G 1/24 (2006.01)

Patent

CA 2162153

Aqueous compositions comprising certain amino acids such as polyaspartic acid or aspartic acid/glutamic acid copolymers when at least partially protonated at pH of 7 or below effectively clean ferrous metal surfaces by contacting said surfaces with said compositions.

L'invention concerne des compositions aqueuses contenant certains acides aminés, tels que l'acide polyaspartique ou des copolymères de l'acide aspartique et de l'acide glutamique. lorsque ces polymères sont protonés au moins partiellement à un pH de 7 ou moins, ils sont efficaces pour nettoyer par contact des surfaces de métaux ferreux.

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