活性炭过滤器是通过活性炭滤料来吸附水中的有机物，离子等杂质的机械过滤器，是机械过滤器的一种，主要是通过反洗，正洗来清洗滤料。
     活性炭有一定的腐蚀性，他吸附的金属离子对罐体有一定的腐蚀，二来是因为活性炭和罐体形成电化学腐蚀，加速了机械过滤器的腐蚀，他不像石英砂过滤器的石英砂，已经精密过滤器滤芯和袋式过滤器过滤袋，他们对罐体腐蚀性小，所以活性炭过滤器内部一定要防腐做好。
    活性炭过滤器内部一般采用衬胶或者涂环氧防腐，相对来讲，衬胶的防腐性能高于环氧防腐。并且耐久性，衬胶过滤器比环氧的过滤器好，因为活性炭过滤器在正洗和反洗过程容易将活性炭磨损掉。但是衬胶的成本是远高于环氧成本，所以用于需要综合考虑的哪种防腐。

Activated Carbon Filter is through activated carbon filter media to absorb water organic matter, ions and other impurities of the Mechanical filter, is a kind of Mechanical filter, mainly through backwashing, is washing to clean filter media. Activated Carbon has a certain degree of corrosion, first of all, he adsorption of Metal Ions on the tank has a certain degree of corrosion, second, because activated carbon and tank formed electrochemical corrosion, accelerated the corrosion of Mechanical filter, unlike the quartz sand of the quartz sand filter, which has a precision filter core and bag filter bags, they are less corrosive to the tank, so the inside of the activated carbon filter must be well protected against corrosion. The inner part of the activated carbon filter is usually lined with glue or coated with epoxy. Comparatively speaking, the anticorrosion performance of the lining glue is higher than that of epoxy. And durability, lining rubber filter than epoxy filter, because the active carbon filter in the process of washing and backwashing is easy to wear out the active carbon. But the cost of lining glue is much higher than the cost of epoxy, so it is necessary to consider which kind of anticorrosion.