LOW-FOAMING COMPOSITION AND METHOD FOR DEGREASING METAL SURFACES

摘要

A liquid degreasing composition that can be satisfactorily substituted for vapor degreasing and can be sprayed onto the surfaces to be degreased without generating impractical volumes of foam contains water and: (A) alkalinizing agent; (B) alkali stable nonionic surfactant molecules that are not alkalinizing agents; and (C) hydrotroping agent molecules that are not either alkalinizing agents or nonionic surfactants. Preferably the alkalinizing agent is alkali metal silicate, and the composition also contains boric acid as a corrosion inhibitor.