Effect of Sodium Hexametaphosphate Content on PH Value of Coatings

Magnesium alloys are easy to react with coatings, requiring the pH value of coatings to be alkaline, which can avoid chemical reaction between cast magnesium alloys and coatings, and provide an alkaline environment to reduce the corrosion of coatings on molds and castings. With the increase of sodium hexametaphosphate, the pH value of the coating decreases. When the amount of sodium hexametaphosphate is 8%, the pH value of the coating is 10.34, which meets the requirements of magnesium alloy for the performance of the coating.

Zhengzhou Yucai Phosphate Chemical Plant specializes in producing: sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate, disodium hydrogen phosphate, industrial phosphoric acid, trisodium phosphate, aluminium dihydrogen phosphate, solid aluminium dihydrogen phosphate, liquid aluminium dihydrogen phosphate, sodium dihydrogen phosphate and other phosphate series products, after more than 30 years of continuous pursuit and development, relying on skilled chemical technology and product development, equipment updating and more. Colleges and universities have established a good cooperative and sharing relationship, playing a brand in the chemical industry (Yucai Phosphate)!