金竹竹叶提取物在HCl中对铝的缓蚀作用研究

doi:10.3969/j.issn.0253-2417.2013.02.023

›› 2013, Vol. 33 ›› Issue (2): 129-133.doi: 10.3969/j.issn.0253-2417.2013.02.023

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Corrosion Inhibition of Extracts from Phyllostachy sulphurea Leaves for Aluminum in HCl Solution

LIU Jian-xiang¹, WANG Rui-ling², FU Hui¹, LI Xiang-hong¹

1. Faculty of Science, Southwest Forestry University, Kunming 650224, China;2. Faculty of Forestry, Southwest Forestry University, Kunming 650224, China

Received:2012-08-13 Revised:1900-01-01 Online:2013-04-30 Published:2013-04-30

Abstract

Abstract: Fourier transform infrared(FT-IR) spectroscopy was employed to characterize the main functional groups of extracts from Phyllostachy sulphurea leaves(PSLE). The inhibition effect of PSLE on the corrosion of aluminum in 1.0 mol/L HCl was studied by mass loss and electrochemical impedance spectroscopy(EIS).The results showed that the PSLE was a good inhibitor in hydrochloric acid for aluminum, and the maximum inhibition efficiency was 77.7 %. The corrosion inhibition of bamboo leaves was good at 20 ℃ and 30 ℃.The adsorption of PSLE on the aluminum surface obeys the Langmuir adsorption isotherm equation. Adsorption heat ΔH_ads was calculated by Van't Hoff, and the inhibition mechanism was discussed in detail according to the parameters. All EIS exhibited that corrosion inhibitor at the aluminum surface had good are resistance. PSLE was a mix-type inhibition.

Key words: Phyllostachy sulphurea, extract, aluminum, inhibition, hydrochloric acid, adsorption

CLC Number:

TQ35

LIU Jian-xiang;WANG Rui-ling;FU Hui;LI Xiang-hong. Corrosion Inhibition of Extracts from Phyllostachy sulphurea Leaves for Aluminum in HCl Solution[J]. , 2013, 33(2): 129-133.

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Corrosion Inhibition of Extracts from Phyllostachy sulphurea Leaves for Aluminum in HCl Solution

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