| abstract |
The present invention provides a water-soluble cleaning liquid that has good corrosion resistance, prevents discoloration of a new surface, and is excellent in rust prevention and antifoaming properties, particularly for aluminum and aluminum alloy after metal processing. (A) Sodium diphenyl ether disulfonate having an alkyl group having 8 to 18 carbon atoms, sodium naphthalene sulfonate having an alkyl group having 8 to 18 carbon atoms, sodium alkyl sulfate having 15 to 18 carbon atoms, and carbon number It is a water-soluble cleaning liquid characterized by containing at least one selected from the sodium salts of 8-18 olefin sulfonates. [Selection figure] None |