Corrosion protection of stainless steel in 15% H SO 2 4
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
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| Title |
Corrosion protection of stainless steel in 15% H SO 2 4
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| Creator |
Singh, Rajesh Kumar
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| Subject |
Materials Science
Metallurgy |
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| Description |
Stainless steel is a very important industrial metal which is used in different appliances of phosphate fertilizer industries. Sulphuric acid is a major chemical to apply
for manufacturing of fertilizers. This acid develops corrosion cell with stainless steel and
accelerates internal and external corrosion reaction on surface of base metal. The used
acid produces several forms of corrosion and change physical, chemical and mechanical
properties of materials. Sulphuric acid creates corrosive environment for stainless steel
and protection such acid attack used organic inhibitors 2-(aminomethyl) phenol and
2-(aminomethyl) benzenethiol and these inhibitors anticorrosive properties studied in
15% H SO medium. Inhibitors' action studied at different temperatures and 10mM 2 4
concentration. The corrosion rate of metal absence and presence of inhibitors were
determined gravimetric and potentiostat techniques. The surface adsorption activities
studied Langmuir isotherm. The results of potentiostat were shown that corrosion current
density reduced after addition of inhibitors. Thermodynamical parameters of both
inhibitors like activation energy, heat of adsorption, free energy, enthalpy and entropy
were indicated thin film formed on the surface base metal which binds with physisorptionchemisorption
adsorption. Thermodynamical parameters results showed that both
inhibitors were good thermal and molecular stability on surface of base metal. The
experimental results of surface coverage area and inhibition efficiency were exhibited
that used inhibitors were highly effective in sulphuric acid medium.
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| Publisher |
CSIR-NML
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| Date |
2014-12
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://eprints.nmlindia.org/7210/1/239-244.pdf
Singh, Rajesh Kumar (2014) Corrosion protection of stainless steel in 15% H SO 2 4. Journal of Metallurgy and Materials Science, 56(4) (NON-SCI). pp. 239-244. |
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| Relation |
http://www.nmlindia.org/7210
http://eprints.nmlindia.org/7210/ |
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