Anticorrosion potential of diethylenetriaminepentakis (methylphosphonic) acid on carbon steel in hydrochloric acid solution

作者：Bouammali H; Jama C; Bekkouch K; Aouniti A; Hammouti B; Bentiss F^*

来源：Journal of Industrial and Engineering Chemistry, 2015, 26: 270-276.

DOI：10.1016/j.jiec.2014.11.039

• Organic phosphonic acid
• Carbon steel
• Hydrochloric acid
• Corrosion inhibition
• Adsorption

The inhibition ability of diethylenetriaminepentakis(methylphosphonic) acid (DTMP) against carbon steel corrosion in 1 NI HCl at 30 degrees C was evaluated by weight loss, ac impedance and electron probe microanalyser (EPMA) methods. The experimental results showed that DTMP was a good inhibitor for the steel corrosion in 1 M HCl medium and its inhibition efficiency increased with the inhibitor concentration. Data, obtained from ac impedance measurements, were analysed to model the corrosion inhibition process through appropriate equivalent circuit models. Adsorption of DTMP on the carbon steel surface followed the Langmuir adsorption isotherm. Surface analysis supported the formation of a protective inhibitor film on the carbon steel surface.

• 出版日期2015-6-25