Influence of water quality of circulating water on corrosion of materials in SCAL indirect air cooling system

XIAO Haigang; HUANG Wanqi; TANG Ziqiang; WANG Gang; ZHANG Hongbo; SU Wei; HAN Shuang

doi:10.19666/j.rlfd.201904110

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Influence of water quality of circulating water on corrosion of materials in SCAL indirect air cooling system

更新时间：2025-09-28

- Influence of water quality of circulating water on corrosion of materials in SCAL indirect air cooling system
- Thermal Power Generation Vol. 48, Issue 12, Pages: 13-18(2019)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 宁夏京能宁东发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201904110
  CLC： TK172
- Published Online：31 December 2019，
  
  Published：2019
- 稿件说明：
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XIAO Haigang, HUANG Wanqi, TANG Ziqiang, et al. Influence of water quality of circulating water on corrosion of materials in SCAL indirect air cooling system[J]. Thermal power generation, 2019, 48(12): 13-18.
DOI：

XIAO Haigang, HUANG Wanqi, TANG Ziqiang, et al. Influence of water quality of circulating water on corrosion of materials in SCAL indirect air cooling system[J]. Thermal power generation, 2019, 48(12): 13-18. DOI： 10.19666/j.rlfd.201904110.

摘要

目前

表面冷凝器铝换热器(SCAL)型间接空冷系统(间冷)循环冷却水的水质运行控制尚无标准可依

间冷循环水水质对系统金属材料腐蚀的影响也缺乏系统研究。本文根据间冷循环水水质特点

通过实验室模拟实验研究水中痕量SO_4~(2–)、Cl~–以及pH值等因素对碳钢和纯铝腐蚀的影响。结果表明:水中痕量(≤1 mg/L)的SO_4~(2–)和Cl~–均可加速碳钢腐蚀;SO_4~(2–)对碳钢腐蚀表现出自催化效应

同样质量浓度的SO_4~(2–)比Cl–对碳钢腐蚀危害更大

而SO_4~(2–)对纯铝表现出缓蚀作用;溶液pH值上升则会加速纯铝腐蚀。

Abstract

Currently

there is no standard for water quality control for circulating water in indirect air cooling system of surface condenser aluminum heat exchanger(SCAL). Additionally

study on the influence of water quality on the corrosion of materials in this system was scarce. To solve this problem

according to the characteristics of water quality of circulating water in this system

the influence of trace SO_4~(2–)

Cl~– and pH value on corrosion process of the carton steel and pure aluminum were experimentally investigated in laboratory. The results indicate that

trace SO_4~(2–) and Cl~– in the water(≤1 mg/L) could accelerate the corrosion process of the carbon steel. The SO_4~(2–) could be self-catalyzed during this process. Therefore

the harm of SO_4~(2–) was much larger than that of the Cl– with the same concentration. Furthermore

SO_4~(2–) could also reduce the corrosion of the pure aluminum

and the corrosion rate of aluminum increased with the pH value.

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