植酸钾对环氧带锈涂装涂层防护性能的影响

Effect of Phytic Acid Dipotassium on Corrosion Performance of Epoxy Coating on Rust Q235 Carbon Steel

探讨了植酸钾应用于带锈涂料的可能性。利用电化学测试(EIS)、附着力测试等手段对带锈清漆涂层以及不同植酸钾含量的带锈涂层的耐腐蚀等性能进行评价。结果表明,植酸钾具有缓蚀作用,可以减缓带锈基体的腐蚀,在带锈涂装涂层中添加植酸钾可提高涂层附着力,增强涂层的屏蔽作用,改善涂层的防腐蚀性能。当植酸钾添加量为5%(质量分数)时,带锈涂层防腐蚀性能较好。

Epoxy coatings with different additives of phytic acid dipotassium were applied on rust carbon steel Q235. The corrosion performance and adhesive strength of coatings were assessed by means of electrochemical impedance（EIS） and spectroscopy adhesion measurement. The results indicated that phytic acid dipotassium could act as corrosion-inhibitor for the rust steel. The barrier effectiveness and adhesive strength of the epoxy coatings could be enhanced by the addition of phytic acid dipotassium in the epoxy. Among others, the epoxy coating containing 5%（mass fraction） phytic acid dipotassium had the best corrosion performance.