An alkaline degreasing solution contains 0.01 to 10 g/ℓ of a nonionic surface-active agent, and an organic substance exhibiting water solubility or water dispersibility at a pH value of at least 8, having a phenolic hydroxyl group with a molecular weight of at least 500, at a weight ratio of 0.1 to 2:1 = (organic substance having a phenolic hydroxyl group):(nonionic surface-active agent). This alkaline degreasing solution has a pH value of at least 8.
碱性脱脂溶液含有 0.01 至 10 g/ℓ 的非离子表面活性剂,以及在 pH 值至少为 8 时具有
水溶性或
水分散性的有机物,该有机物具有分子量至少为 500 的
酚羟基,其重量比为 0.1 至 2:1 =(具有
酚羟基的有机物):(非离子表面活性剂)。这种碱性脱脂溶液的 pH 值至少为 8。