2results about How to "Prevent corrosion" patented technology

The invention relates to the technical field of magnesium phosphate cement materials, and particularly discloses a magnesium potassium phosphate cement-based material with high compactness and high salt corrosion resistance and application of the magnesium potassium phosphate cement-based material. The magnesium potassium phosphate cement-based material is prepared from the following components in parts by weight: 30 to 40 parts of dead burned magnesium oxide, 15 to 20 parts of monopotassium phosphate, 3 to 5 parts of retarder, 0.01 to 0.03 part of crystalline phosphate, 30 to 40 parts of fine aggregate and 8 to 13 parts of mixing water. Wherein the molecular formula of the crystalline phosphate is KNaMg2 (PO4) 2.14 H2O. By introducing the crystalline phosphate in a special structural form, the hydration evolution path and the microstructure of the magnesium potassium phosphate cement-based material in a salt erosion environment are effectively improved, and the salt erosion resistance is remarkably improved.

This invention discloses a multilayer synergistic composite membrane for alkaline water electrolysis to produce hydrogen, its preparation method, and its application, belonging to the field of water electrolysis hydrogen production technology. The membrane comprises, from bottom to top, a base support layer, an intermediate functional layer, and a surface hydrophilic layer; wherein the base support layer is a hydrophilically treated polyphenylene sulfide nonwoven fabric, the intermediate functional layer is a polysulfone / ZrO2-TiO2 heterostructure composite material, and the surface hydrophilic layer is a chitosan-polyethyleneimine dual-network hydrogel. This membrane features low surface resistivity, high gas barrier properties, excellent mechanical strength, and long-term stability, making it particularly suitable for alkaline water electrolysis to produce hydrogen under high current densities.