表面技术2025，Vol.54Issue(10)：128-140,13.DOI:10.16490/j.cnki.issn.1001-3660.2025.10.010
基于灰色系统理论的熔结环氧粉末涂层寿命预测研究
Life Prediction of Fusion Bonded Epoxy Powder Coating Based on Grey System Theory
摘要
Abstract
In the present day,coatings serve as a vital method for shielding metals from the detrimental effects of corrosion.Most researchers focus on how to improve the performance of the coating,but ignore how to predict the life of the coating.While a few scholars have studied the service life of thin-film,solvent-borne organic coatings,there is a relative lack of research on heavy-duty anti-corrosion coatings under extreme environmental conditions.Therefore,there is an imperative for studies that aim to predict the service life of heavy-duty anti-corrosion coatings.Grey prediction can effectively predict the future trend of an uncertain system with limited data samples and insufficient information.In order to ensure the long-term safe operation of FBE coatings in the field of corrosion protection,the Grey System Theory was adopted to construct a mathematical model for quantifying and predicting the failure rate and service life of coatings under different environmental conditions.With electrochemical techniques,the low-frequency alternating current impedance values of carbon steel coated with FBE were measured at five distinct temperatures of 25,60,70,80 and 90℃,all within a simulated seawater solution.Based on the Grey System Theory's GM(1,1)model,the correlation between the low-frequency impedance modulus of the FBE coating and the soaking time in the simulated liquid was investigated.Therefore,a mathematical model for predicting the corrosion life of coatings was established.Additionally,the mathematical model successfully defined a quantitative constant α to describe the rate of coating failure.It was found that|Z|0.01 Hz was 107 Ω·cm2 after immersion at 90℃for 100 d,which decreased by four orders of magnitude,and the adhesion also decreased from grade 1 to grade 3,allowing 107 Ω·cm2 to be used as a failure criterion for FBE coatings.FBE coating samples were soaked at five temperatures of 25,60,70,80 and 90℃.The low-frequency impedance values in the end period were around 2.69×1010 Ω·cm2,8.65×109 Ω·cm2,7.15×108 Ω·cm2,3.49×107 Ω·cm2,and 1.10×107 Ω·cm2,respectively.A mathematical model was used to successfully predict the service life of 200 μm FBE coatings in 3.5％NaCl solution at five temperatures of 25,60,70,80 and 90℃.Compared with 25℃,the failure constants of the FBE coatings increased by 1.9,4.0,9.0 and 11.5 times at 60,70,80 and 90℃.It is also concluded that a 200 µm FBE coating has a service life of up to 2 240 days in a room temperature environment of 25℃.When the ambient temperature rises to 60℃,the service life of the coating is halved to 1 120 days.As the temperature continues to rise,the durability of the coating drops sharply,with the life reduced to 400 days at 70℃and further to 225 days at 80℃.Under the extreme high temperature of 90℃,the service life of the FBE coating is only 100 days.The model is verified to have good accuracy and high reliability.关键词
熔结环氧粉末涂层/灰色系统理论/电化学阻抗/寿命预测/低频阻抗模值Key words
fusion bonded epoxy powder coating/Grey System Theory/electrochemical impedance/life prediction/low-frequency impedance modulus分类
金属材料引用本文复制引用
程慎聪,魏英华,吕晨曦,曹海娇..基于灰色系统理论的熔结环氧粉末涂层寿命预测研究[J].表面技术,2025,54(10):128-140,13.基金项目
中国科学院战略性先导科技专项(XDA13040500)The Strategic Priority Research Program of the Chinese Academy of Science(XDA13040500) （XDA13040500）
