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The Inhibition Effect of Gum Arabic on the Corrosion of Carbon Steel in Hcl Medium

Auteurs : LOUAFI Ahmed, BENTRAH Hamza, DJELLAB Mounir, ALMI Sana
Année : 2016
Domaine : Sciences des matériaux
Type : Communication
Conférence: 7th African Conference on Non Destructive Testing ACNDT 2016 & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : Gum Arabic, corrosion, steel, inhibition efficiency, inhibitor

Résumé :

The inhibition effect of exudate gum from Acaciatrees (Gum Acacia, GA) on the corrosion of carbon steel API 5LX60in acidic media1 M was studied by weight loss,electrochemical polarization methods; also, surface morphology.The results of weight loss and electrochemical polarization methods indicated that the inhibitor efficiency (I%) increased with increasing inhibitor concentration.The results show that GAis a good inhibitor in 1 M . The maximum percentage inhibition efficiency was found to be 92% at 4 g L. The adsorption of GA on pipeline API 5L X60 steel surface obeys Langmuir adsorption isotherm, and involves physical adsorption. Polarization curves reveal that GA acts as a mixed-type inhibitorin sulfuric acid.