陈莉荣,阚伟海,姜庆宏,王哲.软化水中除氧剂与 pH 值对碳钢腐蚀率影响研究[J].表面技术,2015,44(7):108-113.
CHEN Li-rong,KAN Wei-hai,JIANG Qing-hong,WANG Zhe.Study on Effects of pH Value and Oxygen Scavenger on Corrosion Rate of Carbon Steel in Softened Water Solution[J].Surface Technology,2015,44(7):108-113 |
| 软化水中除氧剂与 pH 值对碳钢腐蚀率影响研究 |
| Study on Effects of pH Value and Oxygen Scavenger on Corrosion Rate of Carbon Steel in Softened Water Solution |
| 投稿时间：2015-03-10 修订日期：2015-07-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.07.020 |
| 中文关键词: 软化水 pH 值 碳钢 腐蚀 异抗坏血酸钠 乙醛肟 除氧 |
| 英文关键词:softened water pH value carbon steel corrosion sodium hexametaphosphate acetaldoxime deoxidization |
| 基金项目: |
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| Author | Institution |
| CHEN Li-rong | College of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China |
| KAN Wei-hai | College of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China |
| JIANG Qing-hong | College of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China |
| WANG Zhe | College of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China |
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| 中文摘要: |
| 目的 针对供热管网软化水水质,研究在供热软化水中除氧剂乙醛肟和异抗坏血酸钠的除氧性能,以及添加除氧剂乙醛肟和异抗坏血酸钠、调节 pH 值对碳钢腐蚀率的影响。 方法 通过除氧实验、静态挂片和旋转挂片实验,研究除氧剂乙醛肟和异抗坏血酸钠的除氧性能以及添加除氧剂对碳钢腐蚀率的影响,用1 mol/ L 的氢氧化钠和碳酸钠溶液调节 pH 值对碳钢腐蚀率的影响,以及添加除氧剂后在 pH=11时对碳钢腐蚀率的影响。 结果 在乙醛肟和异抗坏血酸钠的质量浓度为 160 mg/ L 时,除氧率分别为45. 68% 和 71. 83% ,碳钢的腐蚀率分别为 0. 1948,0. 0728 mm/ a;用氢氧化钠和碳酸钠调节 pH 值为 11时,碳钢的腐蚀率分别为 0. 0751,0. 0143 mm/ a;在乙醛肟和异抗坏血酸钠的质量浓度为 120 mg/ L,pH =11 时,碳钢的腐蚀率分别为 0. 0885,0. 0365 mm/ a;在乙醛肟的质量浓度为 140 mg/ L,pH= 11 时,碳钢的腐蚀率达到 0. 1531 mm/ a。 结论 异抗坏血酸钠的除氧效果优于乙醛肟的除氧效果,碳钢的腐蚀率随着异抗坏血酸钠浓度的增加而降低,在乙醛肟浓度大于 120 mg/ L 时,碳钢的腐蚀率随着投加量的增加出现先增大后减小的趋势;随着 pH 值的增大,碳钢的腐蚀率在降低。 |
| 英文摘要: |
| Objective To research the deoxidization capacity of deoxidants acetaldoxime and sodium hexametaphosphate in softened water and the effect of sodium hexametaphosphate and acetaldoxime and pH value on the corrosion inhibiting capacity of carbon steel targeting at the quality of heating softened water. Methods The deoxidizing test, the static coupon test and the rotary coupon test were used to investigate the effects on corrosion rate of sodium hexametaphosphate and acetaldoxime, adjusting pH value with sodium hydroxide and sodium carbonate and adjusting pH=11 after deoxidization for carbon steel. Results Under the condition of doses of 160 mg/ L acetaldoxime and sodium hexametaphosphate, the deoxidization rate was 45. 68% and 71. 83% , the corrosion rate was 0. 1948 mm/ a and 0. 0728 mm/ a. The corrosion rate was 0. 0751 mm/ a and 0. 0143 mm/ a with sodium hydroxide and sodium carbonate adjusting pH to 11. And under the condition of pH=11 adjusted by doses of 120 mg/ L acetaldoxime and sodium hexametaphosphate, the corrosion rate was 0. 0885 mm/ a and 0. 0365 mm/ a, while the corrosion rate was 0. 1531 mm/ a at a dose of 140 mg / L acetaldoxime, pH = 11. Conclusion The deoxygenation rate by sodium hexametaphosphate was better than by acetal-doxime, the corrosion rate of carbon steel decreased with addition of sodium hexametaphosphate, fluctuated with addition of acetal-doxime when acetaldoxime was more than 120 mg / L, and decreased with the increasing of pH value. |
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