Polyaluminum chloride used as a coating additive Usually use aluminum chloride as a flocculant to use. Polyaluminium chloride and the traditional inorganic coagulant fundamental difference is that the traditional inorganic coagulant is a low molecular weight crystalline salt, and the structure of polyaluminum chloride by the morphological diversity of polycarboxylate complex composition, flocculation and sedimentation speed, apply PH value of a wide range of non-corrosive pipeline equipment, water purification effect is obvious, can effectively remove the water quality SS, COD, BOD and arsenic, mercury and other heavy metal ions, the product is widely used in drinking water, industrial water and sewage treatment field. The next introduction is used as a paint additive. Because of its strong bridging adsorption properties, PACs provide three tons of PAC samples during the hydrolysis process, such as agglomeration, adsorption and precipitation, for the coating additive Experiment, add the ratio of 0.5 percentage points, to achieve good results. Effectively guarantee the original performance of the coating, and improve the adhesion of the coating.