Investigation of Ascorbic Acid as Environment-Friendly Corrosion Inhibitor of Low Carbon Steel in Marine Environment

International Conference on Science and Innovated Engineering

工业技术（总论）;自然科学（总论）

Irwan^1 ; Fuadi, Anwar^1 ; Suhendrayatna^2

Department of Chemical Engineering, Lhokseumawe State Polytechnic, Lhokseumawe

24301, Indonesia^1

Department of Chemical Engineering, Syiah Kuala University, Banda Aceh, Indonesia^2

关键词: Acid concentrations;    Corrosion of low-carbon steels;    Environment friendly;    Inhibition efficiency;    Inhibitor molecules;    Langmuir adsorption isotherms;    Marine environment;    Weight loss method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/536/1/012108/pdf
DOI  :  10.1088/1757-899X/536/1/012108

来源: IOP

【 摘 要 】

The inhibition effect of ascorbic acid against the corrosion of low carbon steel in the marine environment which is represented by NaCl 3.5% solution was studied by weight loss method. The investigations were conducted at the various concentrations of ascorbic acid and immersion time. The effect of ascorbic acid concentration and immersion time on the corrosion rate and inhibition efficiency were measured. The corrosion rate was calculated by the weight loss of the sample at initial and after immersion in the corrosive medium. The results showed that the ascorbic acid exhibit good corrosion inhibitor for low carbon steel in NaCl 3.5% solution. The rate of corrosion decreased with the increase of ascorbic acid concentration and immersion time. The efficiency inhibition of ascorbic acid on low carbon steel corrosion in NaCl 3.5% increase with the rise of concentration and immersion time, which is the maximum of 85.4% at 50 ppm and 15 days immersion time. The action of inhibition is attributed to the adsorption of the inhibitor molecules on the low carbon steel surface following Langmuir adsorption isotherm.