麻竹竹叶提取物在酸性介质中对冷轧钢的缓蚀作用

Corrosion Inhibition of Extractive from Dendrocalamus Latifcorus Munro Leaves for Cold Rolled Steel in Acid Solutions

从麻竹(Dendrocalmus latifcorus Munro)竹叶中提取出的固体物质,可以作为一种环境友好型植物缓蚀剂。用失重法研究了麻竹竹叶提取物在1.0 mol/L HCl1、.0 mol/L H2SO4和1.0 mol/L H3PO4三种酸性溶液中对冷轧钢的缓蚀作用。结果表明:麻竹竹叶提取物对冷轧钢的缓蚀率随缓蚀剂浓度的增加而增大,当其浓度为200 mg/L时,三种酸溶液中的缓蚀效率可分别达到92.3%(HCl)、88.9%(H2SO4)、75.8%(H3PO4)。且在钢表面的吸附符合校正的Langmuir吸附等温式。并根据试验结果探讨了缓蚀机理。

Solid extractive from dendrocalmus latifcorus Munro leaves was investigated as an excellent environmental-friendly plant inhibitor. The inhibition effect of the plant extractive on cold rolled steel （CRS） in three mineral acids （1.0 mol/L HCl, 1.0 mol/L H2SO4 and 1.0 mot/L H3PO4） was studied by weight loss method. The results showed that the inhibition efficiency of the extractive in three mineral acids for CRS was 92.3 % （HCl）, 88. 9 % （H2SO4） ,75. 8% （H3PO4） respectively. The adsorption of the plant inhibitor on the CRS surface followed the Langmuir adsorption isotherm equation. According to the experimental results, the inhibitive mechanism was discussed.