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Author Marikkannu, C. ♦ Sathiyanarayanan, S. ♦ Rengaswamy, N. S.
Source CSIR-Central Electrochemical Research Institute
Content type Text
Publisher Central Electrochemical Research Institute
File Format PDF
Copyright Year ©1999
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Chemical engineering
Subject Keyword Corrosion Protection
Abstract A new manganese phosphating bath which produces coating relatively at lower temperature within a reasonable time by the use of chemical accelerators bas been developed. Bath formulation and operating conditions have been optimized by coating weight determinations. Corrosion resistance property of the resultant coatings has been evaluated in 3% NaCI by electrochemical methods such as potentiodynamic polarisation, linear polarisation and impedance measurements. Results of the electrochemical techniques have heen complemented by salt spray, humidity and immersion tests. Porosity coatin~ has also been studied. Results show that the newer manganese phosphate bath gives good coatin~ at 353 K within 30 minutes. Addition of nitrates of various metals as accelerator produces thicker coatin~. Corrosion studies have shown that the corrosion resistance of the resultant coatin~ are much superior than the conventional coating;.
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1999-01-01
Journal PeerReviewed