| Issue |
MATEC Web Conf.
Volume 106, 2017
International Science Conference SPbWOSCE-2016 “SMART City”
|
|
|---|---|---|
| Article Number | 03028 | |
| Number of page(s) | 7 | |
| Section | 3 Building Materials and Products | |
| DOI | https://doi.org/10.1051/matecconf/201710603028 | |
| Published online | 23 May 2017 | |
Corrosion of galvanized pipes in the hot water supply system
Moscow State University of Civil Engineering, Yaroslavskoye shosse, 26, Moscow, 129337, Russia
* Corresponding author: alexei-waterlab@yandex.ru
The paper describes the problem of steel pipes corrosion in domestic hot water supply systems. A case study of abnormally high rate of corrosion of galvanized steel pipes in a hot water supply system, installed in a complex of residential and public buildings, was considered. The rapid corrosion led to premature failure of these pipelines. Onsite visual inspection, chemical analysis of the tap water with LSI/RSI calculation and scanning electron microscopy and energy-dispersive X-ray spectroscopy analysis were used during this study. The basic factors that lead to pitting corrosion were established: quality of source water (its high corrosion activity), high temperature and local increase in oxygen content near the pipe surface. A possibility of microbial corrosion was also assumed.
© The Authors, published by EDP Sciences, 2017
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