Cleaning solution for stainless steel and cleaning method using same
AssigneesFIH (Hong Kong) Limited, Shenzhen Futaihong Precision Industry Co., Ltd.
InventorsWEI HUANG, LING-QIAN CAI
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Abstract
A cleaning solution for cleaning stainless steels etched by ferric or ferrous salt solution is provided. The cleaning solution including: one or more ingredients selected from a group consisting of inorganic acid, inorganic alkali metal salt, and inorganic alkaline-earth metal salt in a concentration of about 200-600 g/L; complexant being capable of complexing with ferric or ferrous ions in a concentration of about 26-275 g/L; and one of carboxylic acid and carboxylate, or a combination thereof, in a concentration of about 75-250 g/L. A method for cleaning the stainless steels is also described there.
Claims20
A cleaning solution for stainless steel, comprising:
- one or more ingredients selecting from a group consisting of inorganic acid, inorganic alkali metal salt, and inorganic alkaline-earth metal salt in a concentration of about 200-600 g/L;
- complexant being capable of complexing with ferric or ferrous ions in a concentration of about 26-275 g/L;
- and
- one of carboxylic acid and carboxylate, or a combination thereof, in a concentration of about 75-250 g/L.
A method for cleaning stainless steel, comprising:
- providing a cleaning solution, the solution comprising:
- one or more ingredients selecting from a group consisting of inorganic acid, inorganic alkali metal salt, and inorganic alkaline-earth metal salt in a concentration of about 200-600 g/L;
- complexant being capable of complexing with ferric or ferrous ions in a concentration of about 26-275 g/L;
- and one of carboxylic acid and carboxylate, or a combination thereof, in a concentration of about 75-250 g/L;
- and
- contacting the stainless steel with the cleaning solution.
Dependencies are inferred from the claim text.