Affiliation:
1. School of Chemistry and Chemical Engineering Guangzhou Key Laboratory of Sensing Materials & Devices Joint Institute of Guangzhou University and Institute of Corrosion Science and Technology Guangzhou University Guangzhou 510006 P. R. China
2. Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Jieyang 515200 P. R. China
3. State Key Lab of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 P. R. China
Abstract
AbstractDeveloping high‐performance lignin anti‐corrosive waterborne epoxy (WEP) coatings is conducive to the advancement of environmentally friendly coatings and the value‐added utilization of lignin. In this work, a functionalized biomass waterborne epoxy composite coating is prepared using quaternized sodium lignosulfonate (QLS) as a functional nanofiller for mild carbon steel protection. The results showed that QLS has excellent dispersion and interface compatibility within WEP, and its abundant phenolic hydroxyl, sulfonate, quaternary ammonium groups, and nanoparticle structure endowed the coating with excellent corrosion inhibition and superior barrier properties. The corrosion inhibition efficiency of 100 mg L−1 QLS in carbon steel immersed in a 3.5 wt% NaCl solution reached 95.76%. Furthermore, the coating maintained an impedance modulus of 2.29 × 106 Ω cm2 (|Z|0.01 Hz) after being immersed for 51 days in the high‐salt system. In addition, QLS imparted UV‐blocking properties and thermal‐oxygen aging resistance to the coating, as evidenced by a |Z|0.01 Hz of 1.04 × 107 Ω cm2 after seven days of UV aging while still maintaining a similar magnitude as before aging. The green lignin/WEP functional coatings effectively withstand the challenging outdoor environment characterized by high salt concentration and intense UV radiation, thereby demonstrating promising prospects for application in metal protection.
Funder
National Natural Science Foundation of China
State Key Laboratory of Pulp and Paper Engineering
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献