Please use this identifier to cite or link to this item: https://doi.org/10.2166/wh.2013.060
Title: Impact of elevated Ca2+/Mg2+ concentrations of reverse osmosis membrane desalinated seawater on the stability of water pipe materials
Authors: Liang, J.
Deng, A.
Xie, R.
Gomez, M.
Hu, J. 
Zhang, J.
Ong, C.N. 
Adin, A.
Keywords: Corrosion
Desalinated water
Post-treatment
Remineralisation
Water distribution pipeline
Issue Date: 2014
Source: Liang, J., Deng, A., Xie, R., Gomez, M., Hu, J., Zhang, J., Ong, C.N., Adin, A. (2014). Impact of elevated Ca2+/Mg2+ concentrations of reverse osmosis membrane desalinated seawater on the stability of water pipe materials. Journal of Water and Health 12 (1) : 24-33. ScholarBank@NUS Repository. https://doi.org/10.2166/wh.2013.060
Abstract: Hardness and alkalinity are known factors influencing the chemical stability of desalinated water. This study was carried out to investigate the effect of Ca2+ and Mg2+ on corrosion and/or scale formation on the surface of different water distribution pipe materials under tropical conditions. The corrosion rates of ductile iron, cast iron and cement-lined ductile iron coupons were examined in reverse osmosis (RO) membrane desalinated seawater which was remineralised using different concentrations of Ca2+ and Mg2+. The changes in water characteristics and the coupon corrosion rates were studied before and after the post-treatment. The corrosion mechanisms and corrosion products were examined using scanning electron microscope and X-ray diffraction, respectively. We found that the combination of Ca2+ and Mg2+ (60/40 mg/L as CaCO 3) resulted in lower corrosion rates than all other treatments for the three types of pipe materials, suggesting that Ca2+/Mg 2+ combination improves the chemical stability of desalinated seawater rather than Ca2+ only. © IWA Publishing 2014.
Source Title: Journal of Water and Health
URI: http://scholarbank.nus.edu.sg/handle/10635/91006
ISSN: 14778920
DOI: 10.2166/wh.2013.060
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

3
checked on Mar 5, 2018

WEB OF SCIENCETM
Citations

1
checked on Mar 5, 2018

Page view(s)

20
checked on Feb 25, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.