Corrosion Resistance of Magnesium Potassium Phosphate Cement Based Coating Paste to NaCl Solution
LÜ Yin
LI Tao
TANG Lei
REN Fanfan
Abstract：After long-term immersion in NaCl solution and water,the changes in strength,water absorption,phase composition and microstructure of magnesium potassium phosphate cement based(MKPC)coating paste specimens were tested.The results show that after being immersed in NaCl solution for 540 days,the residual rates of flexural and compressive strength of MKPC coating paste specimens are significantly higher than those immersed in water.After excluding the factor of water corrosion,NaCl solution has an enhancing effect on MKPC hardened paste.The residual rates of flexural and compressive strength of MKPC coating paste specimens modified with silicon micro powder and water glass are higher than those of unmodified specimens.The modification of water glass and silicon micro powder can improve the erosion resistance of the MKPC hardened paste to NaCl solution.After being immersed in water and NaCl solution for 540 days,the degree of pore structure of the MKPC coating paste specimens modified with silicon micro powder and water glass is significantly less than that of the unmodified specimens.
Keywords：magnesium potassium phosphate cement based coating pastewater glasssilicon micro powderimmersion in solutionstrengthwater absorption
Publication Date：2025-01-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 19-25 )