Anticorrosive properties and rust conversion mechanism of phytic acid-based surface tolerant coating

被引：4

作者：

Xu, Hao ^{[1
,2
]}

Lu, Guangming ^{[1
]}

Liu, Shuan ^{[1
]}

Pu, Jibin ^{[1
]}

Tian, Shu ^{[1
]}

Mao, Chunlong ^{[3
]}

Chen, Shanjun ^{[3
]}

机构：

[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Key Lab Marine Mat & Protect Technol, Key Lab Marine Mat & Related Technol, Ningbo 315201, Peoples R China

[2] Hohai Univ, Coll Mech & Mat, Nanjing 210098, Peoples R China

[3] Jiangsu Jin Shengyuan Special Valve Ltd, Share Ltd, Haian 226671, Peoples R China

来源：

ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING | 2021年 / 16卷 / 01期

关键词：

anticorrosion; phytic acid; rust; surface tolerant coating; CORROSION PROTECTION; COPPER CORROSION; MAGNESIUM ALLOY; HYBRID COATINGS; GRAPHENE; STEEL; WATER; CAPACITANCE; RESISTANCE; SEAWATER;

D O I：

10.1002/apj.2584

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A phytic acid-based surface tolerant epoxy coating was prepared, and the effect of phytic acid on the corrosion resistance of the composite coating on rusty carbon steel substrate was investigated. The results showed that the low-frequency impedance modulus of the composite coating on rusty carbon steel could reached 10(8)omega center dot cm(2)order of magnitude after immersing for 480 h in 3.5 wt% NaCl solution. Compared with pure epoxy coating, the phytic acid-based surface tolerant epoxy coating on the rusty substrate exhibited better corrosion resistance even if with some artificial defects in the composite coating. The protective performance of the composite coating mainly came from the formation of a stable iron phytate chelate in the reaction of phytic acid and rust. For the rusty carbon steel, the original Fe(3+)on its surface was also transformed by phytic acid penetrating to the interface between the coating and the substrate. Therefore, a dense film was formed with the reaction of phytic acid and rust on the substrates, and the dense film became a part of the whole paint film, which could improve the corrosion resistance of the surface tolerant coating.

引用

页数：12

共 34 条

[1] Possible improvements in the action of some rust converters [J].