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中国腐蚀与防护学报  2017, Vol. 37 Issue (6): 605-612    DOI: 10.11902/1005.4537.2016.086
  研究报告 本期目录 | 过刊浏览 |
高温气相条件下硫酸氢铵与硫酸铵对20#碳钢的腐蚀行为研究
马双忱1, 焦坤灵1, 张立男1, 孙尧1, 吴文龙2, 张小霓2
1 华北电力大学环境科学与工程学院 保定 071003
2 国网河南省电力试验研究院 郑州 450052
Corrosion Characteristics of Carbon Steel in High Temperature Gas Containing Ammonium Bisulfate and Ammonium Sulfate
Shuangchen MA1, Kunling JIAO1, Linan ZHANG1, Yao SUN1, Wenlong WU2, Xiaoni ZHANG2
1 College of Environmental Science and Engineering, North China Electric Power University (Baoding), Baoding 071003, China
2 Electric Power Test Research Institute of Henan Province, Zhengzhou 450052, China
全文: PDF(5427 KB)   HTML
摘要: 

通过失重法研究了20#碳钢在含有硫酸氢铵 (ABS) 和硫酸铵 (AS) 高温气相中的腐蚀行为。采用SEM/EDS和XRD表征手段分析了腐蚀后碳钢试片的微观形貌变化及腐蚀产物的物相组成。结果表明：在108~282 ℃范围内,ABS和AS均对碳钢有腐蚀性,ABS的腐蚀性更为严重;随着ABS和AS浓度的增大,腐蚀速率加快;随着温度的升高,腐蚀速率减缓。推测腐蚀机理为：由于ABS和AS溶液的酸性,碳钢主要发生H+的酸性腐蚀,亦存在氧腐蚀;阳极反应生成的Fe2+发生系列次生反应生成Fe的氧化物,并且Fe2O3、Fe3O4与硫酸铵盐发生相互作用生成 (NH4)Fe(SO4)2等复盐。
关键词 ： SCR,  硫酸氢铵,  硫酸铵,  失重法,  高温腐蚀    
Abstract：

The corrosion of carbon steel in high temperature gas containing ammonium bisulfate (ABS) and ammonium sulfate (AS) was studied by means of weight loss method, SEM/EDS and XRD. Results show that in the range of 108~282 ℃, the ABS and AS in flue gas are both corrosive to carbon steel, while ABS causes more serious corrosion. As the concentration of ABS and AS in gas phase increases, the corrosion rate is accelerated; with the rising gas temperature, the corrosion rate is slowed down. The corrosion mechanism is speculated as follows: due to the acidity of ABS and AS solution, H+ acid corrosion is the main corrosion of carbon steel, but oxygen corrosion also takes place. The anode reaction generated Fe2+ may then induces the secondary reaction to form series of iron oxides, thereafter ammonium sulfate salt interacts with Fe2O3 and Fe3O4 to generate ammonium sulfate (NH4)Fe(SO4)2 and other double salts.
Key words： SCR    ABS    AS    weight loss method    corrosion at high temperature
收稿日期: 2016-06-27     
ZTFLH:  X701  
基金资助:国网河南省电力公司电力科学研究院项目 (SJTYHT/13-GS-178) 和中央高校基本科研业务费专项资金 (2016XS113)
作者简介:

作者简介 马双忱,男,1968年生,博士,教授
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引用本文:

马双忱, 焦坤灵, 张立男, 孙尧, 吴文龙, 张小霓. 高温气相条件下硫酸氢铵与硫酸铵对20#碳钢的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2017, 37(6): 605-612.
Shuangchen MA, Kunling JIAO, Linan ZHANG, Yao SUN, Wenlong WU, Xiaoni ZHANG. Corrosion Characteristics of Carbon Steel in High Temperature Gas Containing Ammonium Bisulfate and Ammonium Sulfate. Journal of Chinese Society for Corrosion and protection, 2017, 37(6): 605-612.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.086      或      https://www.jcscp.org/CN/Y2017/V37/I6/605

图1  实验装置图
图2  300 mg/L ABS/AS对20#碳钢腐蚀速率的影响随与温度的变化曲线
Corrosivemedium Concentration
mgL-1		 Corrosion time / h Superficial areacm2 Original mass / g Weight after corrosion / g Massloss / g Corrosion rate
gcm-2h-1
ABS 300 90 13.2142 8.6614 8.3272 0.3342 2.81×10-4
300 90 13.2236 8.6971 8.4115 0.2856 2.40×10-4
300 90 13.2162 8.4292 8.2147 0.2145 1.80×10-4
300 90 13.2166 8.5382 8.5196 0.0186 1.56×10-5
300 90 13.2214 8.5128 8.5013 0.0115 9.67×10-6
300 90 13.2178 8.5428 8.5323 0.0105 8.83×10-6
ABS 600 90 13.2242 8.6876 7.9813 0.7063 5.93×10-4
600 90 13.2163 8.5125 8.0998 0.4127 3.47×10-4
600 90 13.2188 8.5518 8.1250 0.4268 3.59×10-4
600 90 13.2145 8.5874 8.4199 0.1675 1.41×10-4
600 90 13.2234 8.5437 8.4185 0.1252 1.05×10-4
600 90 13.2196 8.575 8.5567 0.0138 1.54×10-5
AS 300 90 13.2232 8.4723 8.371 0.1013 8.52×10-5
300 90 13.2136 8.453 8.3545 0.0985 8.28×10-5
300 90 13.2182 8.5299 8.477 0.0529 4.45×10-5
300 90 13.2168 8.4222 8.4028 0.0194 1.63×10-5
300 90 13.2218 8.5419 8.5268 0.0151 1.27×10-5
300 90 13.2184 8.5449 8.5304 0.0145 1.22×10-5
表1  不同温度条件下ABS和AS溶液对20#碳钢的腐蚀速率
图3  不同温度下20#碳钢试片在300 mg/L ABS中腐蚀后的微观形貌
图4  不同浓度ABS对20#碳钢腐蚀速率的影响
图5  208 ℃时20#碳钢分别在300和600 mg/L ABS中腐蚀后的微观形貌
图6  20#碳钢在不同温度下300 mg/L的ABS和AS中的腐蚀速率
图7  20#碳钢在不同温度下300 mg/L ABS和AS中腐蚀后的表面微观形貌
图8  20#碳钢试片在154 ℃下300 mg/L ABS中腐蚀后表面腐蚀产物膜的EDS分析结果
图9  20#碳钢试片在208 ℃下300 mg/L ABS中腐蚀后表面的EDS分析结果
图10  20#碳钢经ABS和AS腐蚀后的腐蚀产物XRD谱
图11  20#碳钢试片在154 ℃下300 mg/L AS中腐蚀后的EDS分析结果
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