American Journal of Mining and Metallurgy
ISSN (Print): 2376-7952 ISSN (Online): 2376-7960 Website: http://www.sciepub.com/journal/ajmm Editor-in-chief: Apply for this position
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American Journal of Mining and Metallurgy. 2014, 2(2), 27-31
DOI: 10.12691/ajmm-2-2-2
Open AccessArticle

Study of Corrosion and Corrosion Protection of Stainless Steel in Phosphate Fertilizer Industry

Rajesh Kumar Singh1, and Rajeev Kumar1

1Department of Chemistry, Jagdam College, J P University, Chapra, India

Pub. Date: July 27, 2014

Cite this paper:
Rajesh Kumar Singh and Rajeev Kumar. Study of Corrosion and Corrosion Protection of Stainless Steel in Phosphate Fertilizer Industry. American Journal of Mining and Metallurgy. 2014; 2(2):27-31. doi: 10.12691/ajmm-2-2-2

Abstract

Phosphate industries use bulk amount of concentration H2SO4 during production of phosphate fertilizers. Stainless steel is major supporting metal for completion of several processing operational works. This acid produces corrosive effect for stainless steel. It develops corrosion cell on the surface of base metal and it changes its internal morphology as well as physical, chemical, mechanical properties. H2SO4 behaves like diabetes for this industrial metal and industries face economical. The eradication of corrosion problems used organic inhibitors like 1-(2-chlorophenyl)methanamine and 1-(2-bromophenyl)methanamine and its inhibition effect and surface coverage area studied at different temperatures 3330K, 3430K and 3530K in presence of 15% H2SO4 and 15mM concentration of inhibitors. The corrosion rate of metal was determined by weight loss experiment and potentiostat techniques. The surface adsorption and surface thin film formation were analyzed by application of activation energy, heat of adsorption, free energy, enthalpy and entropy. The inhibition efficiencies and surface coverage areas were shown that the used inhibitors produced anticorrosive effect in acidic medium.

Keywords:
stainless steel inhibitors weight loss potentiostat surface coverage area

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