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近年来供暖水系统管道上开发出很多外形美观、安装方便的铜管材、铝塑管材及塑料管材,但在使用中发生严重腐蚀导致泄漏或管崩现象,较为严重的是铝塑管。为此,对含有铝塑管的供暖单位,应采取必要的防腐措施和手段。1铝塑管接头处腐蚀机理铝塑管与水接触的是塑料,不易在管道中发生腐蚀,但在铝塑管与铝塑管的接头处及铝塑管与铁管的接头处均露出了铝材质,铝材质在pH10~12的介质中腐蚀速度很快。导致第一年使用就有泄漏,第二年发生管崩。腐蚀机理有以下几个方面。
In recent years, a lot of good-looking and easy-to-install copper pipes, plastic pipe and plastic pipe have been developed on the pipeline of the heating water system. However, serious corrosion occurs during use, leading to leakage or collapse. The more serious is the aluminum-plastic pipe. To this end, with aluminum-plastic pipe heating units, should take the necessary anti-corrosion measures and means. 1 aluminum pipe joints at the corrosion mechanism Plastic pipe contact with water is plastic, not easy to corrosion in the pipe, but in the aluminum-plastic pipe and aluminum pipe joints and aluminum pipe and iron pipe joints are exposed Aluminum, aluminum material in the pH 10 ~ 12 corrosion rate in the medium fast. Resulting in leakage in the first year of use, the collapse of the second year. Corrosion mechanism has the following aspects.