Influence of Anti-corrosion Coating Thickness on Sulfate Attack Resistance of Cement Mortars
XIE Chao
SHI Yufeng
WU Ping
SUN Binqiang
SI Zhuozhuo
Abstract：To further clarify the influence of anti-corrosion coating thickness on the protective effect of cement-based materials,the variation regularity of flexural strength of cement mortars with different thicknesses under sulfate attack was investigated.The attack state of the cement mortars was analyzed by nuclear magnetic resonance,scanning electron microscopy,and X-Ray diffraction.Combined with impermeability and bond strength of the coatings,the influence mechanism of coating thickness on the sulfate attack resistance of cement mortars was elucidated.The results reveal that the sulfate attack resistance of coated cement mortars first increases and then decreases as the coating thickness increases.Under the experimental conditions of this study,the lowest flexural strength loss rate,surface damage grade,and pore deterioration degree are exhibited by the cement mortar with a coating thickness of 90 μm.The optimal protective effect is achieved by the anti-corrosion coating with a thickness of 90 μm.
Keywords：anti-corrosion coatingcoating thicknesssulfate attackflexural strengthpore structure
Publication Date：2026-02-28
Online Publishing Date：2026-04-07(First online date of this platform, not the publication date of the document)
Pages：10( 260-269 )