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

Type : Article de conférence
Auteur(s) :  LOUAFI Ahmed, BENTRAH Hamza, DJELLAB Mounir, ALMI Sana
Année :  2016
Domaine : Sciences des matériaux
Conférence: 7th African Conference on Non Destructive Testing (ACNDT) & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Lieu de la conférence:  Oran, Algeria
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.