Published: 2020-03-02

Page: 15-22


Evomec Global Services Limited, 50A GRA Phase 2, Port Harcourt, Rivers State, Nigeria.


Department of Chemistry, Ignatius Ajuru University of Education, Rumuolumeni, P.M.B. 5047, Port Harcourt, Rivers State, Nigeria.

*Author to whom correspondence should be addressed.


Potassium chromate was studied as a corrosion inhibitor of mild steel in cassava fluid extract through the weight loss method. The work showed that at different concentrations and temperatures (25°C and 60°C), that potassium chromate inhibited the corrosion of mild steel in the cassava fluid extract. The investigation revealed that inhibitor efficiency increases with concentration increase and also vary with temperature. The work proved that hydrogen cyanide in the cassava fluid extract was responsible for the corrosion of mild steel and that potassium chromate is an effective inhibitor of mild steel corrosion in cassava fluid extract.

Keywords: Cassava fluid extract, corrosion inhibitor, corrosion rate, potassium chromate.

How to Cite

IGWE, P. U., & EDORI, E. S. (2020). INHIBITORY EFFECT OF POTASSIUM CHROMATE IN CASSAVA FLUID FOR MILD STEEL PROTECTION. Journal of Applied Chemical Science International, 11(1), 15–22. Retrieved from


Download data is not yet available.


Ajide OO, Agara KW, Adagbola AA. Investigating corrosion performance of MCS and KS7SS in different fluid environments. International Journal of Science and Technology. 2012;1(5):286-291.

Adetunji OR. In: Corrosion and materials in the oil and gas industries. Javaherdashti, R., Nwaoha, C and Tan, H. (Editors). CRC Press. 2013;375-394.

Aljbour OR. Modelling of corrosion kinetics of mild steel in hydrochloric acid in the presence and absence of a drug inhibitor. Portugaliae Electrochimica Acta. 2013;34(6):407-416.

Leelavathi S, Rajalakshmi R. Dodonaea viscosa (L) leaves extract as acid corrosion inhibitor for mild steel – A green approach. Journal of Materials and Environmental Science. 2014;4(5):625-638.

Karthikeyan S. Drugs/ Antibiotics as potential corrosion inhibitors for metals – A review. International Journal of ChemTech Research. 2016;9(6):251-259.

Federal Ministry of Agriculture (FMA). Document on Government Policy on Accelerated Cassava Cultivation; 2002.

Cooke RD. An enzymatic assay for the total cyanide content of cassava. Tropical Product Institute. 1978;56-62.

Oluwole OO, Atanda PO, Odekunbi OA, Odegbaju E. Corrosion behavior of 18-8 stainless steel and nickel-plated low-carbon steel in cassava fluid. Journal of Minerals and Materials Characterization and Engineering. 2009;8(10):803-811.

Olorunmiyo OE, Umoru LE, Bernigboye OR. Sodium chromate and diethylene amine as corrosion inhibitors for mild steel in agro-fluids; 2002.

Badmos AY, Ajimotikan AA. The corrosion of mild steel in orange juice environment. A technical report with No: 2009-02 written by Badmos and Ajimotokan of the Department of Mechanical Engineering, University of Ilorin, Nigeria; 2009.

Ita BI, Edem CA. Inhibition of steel corrosion in hydrochloric acid solutions by green A and erythrosone dyes. Global Journal of Pure and Applied Science. 2000;6(2):239-242.

James AO, Akaranta O. The inhibition of corrosion of zinc in 2.0M hydrochloric acid solution with acetone extract of red onion skin. African Journal of Pure and Applied Chemistry. 2009;3(11):212-217.

Fontana MG. Corrosion Engineering, 3rd Edition, Mc Graw-Hill, New York; 1987.

Orubite KO, Oforka NC. Corrosion inhibition of zinc in HCl using Nypa fruticans wurmb extracts. Journal of Applied Science and Environmental Management. 2004;8(1):56-61.

Rosliza R, Wan Nik WB. Improvement of corrosion resistance of AA6061 alloy by tapioca starch in sea water. Current Applied Physics. 2009;10:221-229.

Bello M, Sancristobal J, Ochoa N, Balsamo V. Effect of the degree of substitution of carboxymethylated cassava starch tested as inhibitor of carbon steel. In: Proceedings of the 68th Annual Technical Conference and Exhibition: Orlando. 2010;115.

Bello M, Ochoa N, Balsamo V. Effect of environmental pH on the corrosion bioinhibitive properties of modified cassava starches. In: Proceedings of the 69th Annual Technical Conference and Exhibition; Boston. 2011;266.

James AO, Etela A. Aloe vera: An inhibitor of aluminium corrosion in hydrochloric acid. International Journal of Pure and Applied Chemistry. 2008;3(3):159-163.

Gusti DR, Emriadi, Alif A, Efdi M. Corrosion inhibition of ethanol extract of cassava (Manihot esculenta) leaves on mild steel in sulphuric acid. International Journal of ChemTech Research. 2017;10(2):163- 171.

Ochoa N, Bello M, Sancristobal J, Balsamo V, Albornoz A, Brito JL. Modified cassava starches as potential corrosion inhibitors for sustainable development. Materials Research. 2013;16(6):1209-1219.

Soraya N, Rayenne D, Oulanouar M, Rabah O. Structure-corrosion inhibitor performance relationship: Application to some natural free acids and antioxidants. Portugaliae Electrochimica Acta. 2018;36(1):23-34.