Inhibition of Mild Steel Corrosion by Sodium Dodecyl Benzene Sulfonate and Sodium Oleate in Acidic Solutions
- 1 August 1998
- journal article
- Published by Association for Materials Protection and Performance (AMPP) in Corrosion
- Vol. 54 (8) , 619-627
- https://doi.org/10.5006/1.3287638
Abstract
Inhibition of mild steel corrosion by sodium dodecyl benzene sulfonate ((C12H25C6H4SO3Na [SDBS]) and sodium oleate (CH3[CH2]7CH=CH[CH2]7COONa) in acidic solutions was investigated using a potentiostat, a lock-in amplifier, a contact angle goniometer, a Fourier transform infrared (FTIR) spectrometer, and an ultraviolet (UV)/visible spectrophotometer. In the presence of the organic inhibitors, the corrosion rate was reduced significantly. Anionic SDBS was adsorbed on the positively charged mild steel surface through the electrostatic attraction. However, for sodium oleate, the soluble oleic acid (CH3[CH2]7CH=CH[CH]7COOH) chemisorbed on the steel surface at the first stage. Then, insoluble colloid adsorbed on the chemisorbed surface through van der Waals forces.Keywords
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