Mangifera indica Leave Extracts as Organic Inhibitors on the Corrosion of Zinc Sheet in 5 M H2SO4 Solution

Journal of Applied Sciences and Environmental Management

UWAH, I.E.¹  EKERETE, JACKSON¹  UGI, B.U.¹  IKEUBA, I.A.¹ 

关键词: Langmuir adsorption;    Mangifera indica;    Zinc sheet;    Alkaloids;    Inhibition efficiency;    Tannins;    H2SO4;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

The inhibition efficiency and adsorption characteristics of alkaloids, flavonoidsand tannins extracts of Mangifera indicaleaves in controlling corrosion of Zinc sheet in 5 Mhydrogentetraoxosulphate (VI) acid solution has been evaluated by gasometric method. Theformulation consisting of 2 g/L of extract offers 96.2%, 85.3% and 70.6% inhibitionefficiencies (alkaloids, flavonoids and tannins respectively) at 30°C to Zinc metal immersedin 5 M hydrogentetraoxosulphate (VI) acid solution. Judging from the trend in inhibitionefficiency against temperature, it can be deduced that the adsorption process was physisoptionbeing that corrosion rate increased while inhibition efficiency decreased with temperature.Adsorption mechanism followed the Langmuir adsorption isotherm being that the correlationcoefficient was found to be approximately unity i.e. 0.9237.

【 授权许可】

Unknown