Ming Duan,Gang Wu,Tianbin Gu,Xiaohui Jiang,Lei Zhao,Limei Zhou,Yunwen Liao,Qiang Pu
Present work reports a new type of poly( N -alkyl-2-[4-hydroxybut-2-ynyl] pyridinium bromides) (designated as Po-n, n = 8, 12, 16 of carbon atoms in the alkyl chain). Po-n were synthesized and characterized by FTIR, GPC, and NMR analysis. The possible polymerization mechanism was proposed and supported by theoretic calculation. A preliminary probe was performed on the conductivity and anticorrosive ability of the conjugated polymer. The results showed that these polymers demonstrated poor conductivity, however the conductivity was enhanced by graphene doping. Po-n are good inhibitors for X70 steel corrosion in HCl solution. So, the conjugated polymers may play important roles in the fields of optoelectronic devices and steel corrosion inhibition. Graphical
Yanyan Xu,Wenwen Xiao,Pengli Ge,Wenguang Zeng,Qingshan Liu,Zhengyuan Gao,Yongbo Yan
This work aimed to develop a high-efficiency and reliable alternative for conventional and toxic corrosion inhibitor. A novel tetrazole derivative (1-Phenyltetrazole-5-thiol, PTT) that possessed excellent anti-corrosion capacity was exploited for the first time. Based on the traditional electrochemical investigation, morphological observation, and computer modeling, inhibition ability and adsorption type of PTT for X70 steel in 0.5 M H 2 SO 4 were varied. The electrochemical results showed that PTT was a mixed organic inhibitor, which could retard charge transfer impedance, and slowed down the corrosion rate of steel. Specifically, the highest inhibition efficiency was 95.1% when the added PTT dose was 2 mM. The adsorption model showed that the PTT film was formed via powerful physicochemical adsorption. As shown in theoretical calculations, the lower Δ E , higher μ values and E binding value of PTT corresponded to supreme adsorption performance, which was also a manifestation of the PTT high-efficiency corrosion inhibition.
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