DOI: 10.12187/2025.04.012
Preparation and performance evaluation of anti-corrosion coatings for natural alkali brine collection pipelines
ZHANG Hongzhong
LIU Zhenxing
HU Wanda
LU Yi
ZHANG Shuo
WU Bateer
LI Tuanyuan
Abstract：To address corrosion issues in natural alkali brine collection pipelines,a composite anti-corrosion coating(EP+PDMS@SiO2)was prepared based on epoxy resin(EP)and polydimethylsiloxane(PDMS)as matrix materials,incorporated with octadecyltrichlorosilane(OTS)-modified nano-silica(n-SiO2)particles as fillers.The corrosion resistance of the coating was characterized via Tafel polarization analysis,electrochemical impedance spectroscopy(EIS),and mass loss method.Results indicated that the dosages of n-SiO2 particles and OTS(used as modifier)were critical factors influencing the corrosion resistance of EP+PDMS@SiO2 coatings,with optimal values of 2.1 g(for n-SiO2)and 0.5～1.0 mL(for OTS),respectively.When coated onto N80 steel coupons,the optimized EP+PDMS@SiO2 coating reduced the self-corrosion current and elevated the charge transfer resistance by three orders of magnitude,respectively.The corrosion rate decreased from 2.004 4%to 0.029 2%.These results demonstrate that the OTS-modified n-SiO2-reinforced anti-corrosion coating(EP+PDMS@SiO2)effectively inhibits corrosion in natural alkali brine collection pipelines.
Keywords：natural alkali brinecollection pipelineanti-corrosion coatingnano-silicaoctadecyltrichlorosilane
Publication Date：2025-08-15
Online Publishing Date：2025-08-19(First online date of this platform, not the publication date of the document)
Pages：7( 108-114 )