人们乔迁新居,总喜欢将室内的水泥踢脚线和水泥墙裙油漆一下。但如果油漆不当,油漆面层会出现咬色,鲜亮的漆面变得花花搭搭,光怪陆离。原来,这是水泥中的碱分在作怪。据测定,水泥中的pH值最高可达14,呈强碱性,而油漆的膜面最怕碱腐蚀。一般新房的水泥墙面里含碱很多,残碱在一湿一干的过程中析出,自然状态下进行比较 People moved to their new homes and always liked to paint the interior concrete skirtings and cement skirts. However, if the paint is not properly painted, the paint surface will be bitten, and the bright paint will become laconic and bizarre. It turned out that this is the alkali in cement. According to the determination, the pH value in cement is up to 14 and it is strongly alkaline, while the film surface of paint is most afraid of alkali corrosion. Generally, the cement walls of new houses contain many alkalis. Residual alkalis are precipitated in a wet and dry process and are compared under natural conditions.