ADSORPTION OF ORGANIC-ACIDS ON LOW-CARBON STEEL

The adsorption from solution of chloroacetic acid on low carbon steel has been measured using Langmuir and Bockris-Swinkels isotherm. The co verage has been determined and the standard free energy of adsorption about 4 kJ/mol the adsorption arises largely from metal-adsorbate disp ersion interaction differences between water and organic acid. A knowl edge on the adsorption of organic acids at the electrode-solution inte rface is needed for understanding of organic electrode reactions and t he inhibitive action of organic acid on corrosion.