Corrosion investigations on secondary treated paper mill effluents
Abstract
Purpose
This paper aims to report on corrosivity of secondary-stage paper mill effluent and corrosion performance of stainless steels.
Design/methodology/approach
For this purpose, immersion test and electrochemical polarization tests were conducted in mill and synthetic effluent to evaluate the uniform and localized corrosion.
Findings
Corrosivity of mill effluent has been compared with synthetic and primary-stage effluent of the same mill. It is observed that anions present in them, viz. SO4−, PO34−, NO2− and NO3−, impart inhibition, whereas Cl− and chlorophenols enhance the corrosivity of the effluent. The overall effect of various components was reduction in corrosivity of secondary mill effluent.
Originality/value
These observations can be useful for material selection and helpful in corrosion mitigation in paper mill effluent treatment plants.
Keywords
Acknowledgements
Mr Chhotu Ram is highly thankful to the Ministry of Human Resource Development (MHRD) New Delhi, India, for the financial research grant for pursuing this PhD investigation.
Citation
Ram, C., Sharma, C. and Singh, A.K. (2015), "Corrosion investigations on secondary treated paper mill effluents", Anti-Corrosion Methods and Materials, Vol. 62 No. 5, pp. 327-333. https://doi.org/10.1108/ACMM-01-2014-1347
Publisher
:Emerald Group Publishing Limited
Copyright © 2015, Emerald Group Publishing Limited