發(fā)布時間：2019-01-21 21:00

【摘要】：目的針對供熱管網軟化水水質,研究在供熱軟化水中除氧劑乙醛肟和異抗壞血酸鈉的除氧性能,以及添加除氧劑乙醛肟和異抗壞血酸鈉、調節(jié)p H值對碳鋼腐蝕率的影響。方法通過除氧實驗、靜態(tài)掛片和旋轉掛片實驗,研究除氧劑乙醛肟和異抗壞血酸鈉的除氧性能以及添加除氧劑對碳鋼腐蝕率的影響,用1 mol/L的氫氧化鈉和碳酸鈉溶液調節(jié)p H值對碳鋼腐蝕率的影響,以及添加除氧劑后在p H=11時對碳鋼腐蝕率的影響。結果在乙醛肟和異抗壞血酸鈉的質量濃度為160 mg/L時,除氧率分別為45.68%和71.83%,碳鋼的腐蝕率分別為0.1948,0.0728 mm/a;用氫氧化鈉和碳酸鈉調節(jié)p H值為11時,碳鋼的腐蝕率分別為0.0751,0.0143 mm/a;在乙醛肟和異抗壞血酸鈉的質量濃度為120 mg/L,p H=11時,碳鋼的腐蝕率分別為0.0885,0.0365 mm/a;在乙醛肟的質量濃度為140 mg/L,p H=11時,碳鋼的腐蝕率達到0.1531 mm/a。結論異抗壞血酸鈉的除氧效果優(yōu)于乙醛肟的除氧效果,碳鋼的腐蝕率隨著異抗壞血酸鈉濃度的增加而降低,在乙醛肟濃度大于120 mg/L時,碳鋼的腐蝕率隨著投加量的增加出現先增大后減小的趨勢;隨著p H值的增大,碳鋼的腐蝕率在降低。
[Abstract]:Objective to study the deoxidization performance of acetaldoxime and sodium isoascorbate in the soft water of heating network, and to adjust the effect of pH value on corrosion rate of carbon steel by adding acetaldoxime and sodium ascorbate. Methods the deoxygenation performance of acetaldehyde oxime and sodium isoascorbate and the effect of adding deoxidizer on the corrosion rate of carbon steel were studied by deoxidizing experiment, static hanging sheet test and rotating hanging plate experiment. The effect of pH value of 1 mol/L sodium hydroxide and sodium carbonate solution on corrosion rate of carbon steel and the effect of adding deoxidizer on corrosion rate of carbon steel at 11:00 were studied. Results when the mass concentration of acetaldoxime and sodium ascorbate was 160 mg/L, the deoxygenation rate was 45.68% and 71.83%, respectively, and the corrosion rate of carbon steel was 0.194 8 and 0.0728 mm/a;, respectively. When the pH value of carbon steel is adjusted to 11:00 with sodium hydroxide and sodium carbonate, the corrosion rate of carbon steel is 0.0751n 0.0143 mm/a;, respectively. When the mass concentration of acetaldoxime and sodium ascorbate was 120 mg/L,p H = 11:00, the corrosion rate of carbon steel was 0.0885 鹵0.0365 mm/a;, respectively. When the mass concentration of acetaldehyde oxime is 140 mg/L,p H = 11:00, the corrosion rate of carbon steel reaches 0.1531 mm/a.. Conclusion the deoxygenation effect of sodium isoascorbate is better than that of acetaldehyde oxime. The corrosion rate of carbon steel decreases with the increase of sodium isoascorbate concentration, and when the concentration of acetaldehyde oxime is more than 120 mg/L, the corrosion rate of carbon steel decreases with the increase of sodium isoascorbate concentration. The corrosion rate of carbon steel increases first and then decreases with the increase of dosage. With the increase of pH value, the corrosion rate of carbon steel decreases.
【作者單位】： 內蒙古科技大學能源與環(huán)境學院;
【分類號】：TG172

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