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

Rajesh Kumar Singh^1, and Rajeev Kumar¹

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

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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References:

[1]	Khramov AN, Voevodin NN (2004), Hybrid organo-ceramic corrosion protection coating with encapsulated organic corrosion inhibitors. Thin solid films, 447, 549-557.
[2]	Seth A, van Ooij (2004), Novel water based high-performance primers that can replace metal pretreatments and chromate-containing primers. J. Mater. Eng. Perform. 13, 468-474.
[3]	Ianmuzzi M, Frankel GS, (2007) Mechanisms of corrosion inhibition of AA 2024-T3 by vanadates. Corros. Sci., 49, 2371-2391.
[4]	Moutarlier V, Neveu B, Gigandet MP (2008), Evaluation of corrosion protection for sol-gel coatings doped with inorganic inhibitors. Surf Coat Technol, 202, 2052.
[5]	Code A, Arenas M A, de Frutos (2008), Effective corrosion protection of 8090 alloy by cerium conversion coatings. Electrochim Acta, 53, 7760-68.
[6]	Shem M, Schmidt T, Gerwann J et al (2009), CeO2-filled sol-gel coatings for corrosion protection of AA2024-T3 aluminium alloy, Corrosion Sci. 51, 2304.
[7]	Pulvirenti A L, Bishop E J, Adel-Hadai M A, Barkatt A, (2009), Solubilisation of nickel from powders at near-neutral pH and the role of oxide layers. Corros. Sci. 51, 2043-2054.
[8]	Glezakou V A, Dang LX, Mc Grail BP,(2009) Spontaneous activation of CO2 and possible corrosion pathways on the Low-index iron surface Fe (100), J. Phys. Chem. 113, 3691-3696.
[9]	Farias MCM, Santos CAL, (2009) Friction behavior of lubricated zinc phosphate coating, Wear, 266, 873-877.
[10]	Cuevas-Arteaga C, (2008) Corrosion study of HK-40m alloy exposed to molten sulphate|vandate mixtures using the electrochemical noise technique, Corros. Sci. 50, 650-663.
[11]	Singh R K, Misra Sanjoy,(2013) Corrosion protection of stainless steel in CO2 environment by nanocoating of zinc phosphate with DLC filler, Journal of Metallurgy & Materials Science, 55, 149-156.
[12]	Singh R K, Misra Sanjoy, (2013) Corrosion protection of rebar steel in marine atmosphere by nanocoating, Journal of Metallurgy & Materials Science, 55, 313-321.
[13]	Singh R K, Misra Sanjoy,(2013) Corrosion protection of mild steel in SO2 environment by nanocoating with DLC filler, Journal of Metallurgy & Materials Science, 55, 227-234.