Yu Yaohong, Bai Jintao, Ma Xiaohan, Wang Shengxing, Hu Dalong, Niu Jun, Zhang Jiangtao, Du An, Sun Dongqi, Lu Jian, Fan Yongzhe
Xi'an TPRI Water Management & Environment Protection Co., Ltd., Xi'an 710054, China.
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
Materials (Basel). 2023 Jul 27;16(15):5270. doi: 10.3390/ma16155270.
An effective strategy for achieving cost-effective and environmentally friendly desulfurization wastewater in coal-fired power plants involves the incorporation of desulfurization wastewater into the slag water system. The objective of this study was to analyze the corrosion behavior of Q235-A slag-picker shell material upon the introduction of FGD wastewater into the slag water system. The dynamic weight loss method, electrochemical testing method and microscopic phase characterization were employed to investigate the impact of varying chloride ion concentrations (ranging from 1000 mg/L to 30,000 mg/L) of flue gas desulfurization wastewater (FGD wastewater) on the corrosion of Q235-A slag-picker shell material. The test results indicate that as the concentration of chloride ions increases, the corrosion rate increases from 1.1487 mm/a to 1.5590 mm/a when the concentration is less than 10,000 mg/L. However, when the concentration exceeds 10,000 mg/L, the corrosion rate decreases from 1.559 mm/a to 1.0393 mm/a. The corrosion rate is above 1 mm/a at all concentrations. As the Cl concentration, the quality of the corrosion product film initially increases and then decreases. The primary components of the corrosion product are α- FeOOH, γ-FeOOH, β-FeOOH, FeO and γ-FeO.
在燃煤电厂中实现具有成本效益和环境友好型的脱硫废水处理的有效策略包括将脱硫废水纳入冲渣水系统。本研究的目的是分析在冲渣水系统中引入烟气脱硫废水（FGD废水）后Q235-A捞渣机外壳材料的腐蚀行为。采用动态失重法、电化学测试法和微观相表征法，研究了烟气脱硫废水（FGD废水）中不同氯离子浓度（1000mg/L至30000mg/L）对Q235-A捞渣机外壳材料腐蚀的影响。试验结果表明，当氯离子浓度小于10000mg/L时，随着氯离子浓度的增加，腐蚀速率从1.1487mm/a增加到1.5590mm/a。然而，当浓度超过10000mg/L时，腐蚀速率从1.559mm/a降至1.0393mm/a。在所有浓度下，腐蚀速率均高于1mm/a。随着Cl浓度的增加，腐蚀产物膜的质量先增加后减少。腐蚀产物的主要成分是α-FeOOH、γ-FeOOH、β-FeOOH、FeO和γ-FeO。
