以北方某电厂循环冷却水为例,用电化学方法研究了Cl-、SO2-4、S2-和pH值等因素对HSn701-B铜合金管材点蚀的影响.极化曲线表明:在该电厂冷却水水质条件下,该管材的点蚀电位随水样中Cl-浓度的增大而下降,腐蚀电位也随之下降,但钝化电流变化不大,点蚀电位与Cl-浓度关系的表达式为:Eb=61.19-14.83lg[Cl-];少量SO2-4的加入对铜管的腐蚀有阻碍作用,当溶液中[HCO-3]/[SO2-4]<0.47时,又有促进作用;S2-的加入使铜管的点蚀电位负移、钝化电流增大;pH值的降低会使管材的点蚀电位负移.
参考文献
| [1] | 安洪光.张家口发电厂节水方案分析[J].华东电力,2003(10):44-47. |
| [2] | 彭珂如,钱州亥.凝汽器铜管点蚀的研究[J].材料保护,1992(10):18. |
| [3] | 周业蓉.新型黄铜冷凝管的研制[J].腐蚀科学与防护技术,1989(01):28. |
| [4] | 杨武.金属的局部腐蚀[M].北京:化学工业出版社,1995:61-62. |
| [5] | 解群,梁磊.冷却水中SO42-对凝汽器不锈钢管的缓蚀作用[J].上海电力学院学报,2000(02):33-36. |
| [6] | Macdonald D D;Syrett B C;Wing S S .Corrosion of Cu-Nickel alloys 706 and 715 in flowing seawater.Ⅱ Effect of dissolved sulfide[J].Corrosion,1979,35(08):367-377. |
| [7] | Macdonald D D;Syrett B C;Wing S S .Corrosion of Cu-nickel alloys in seawater polluted with sulfide and sulfide oxidation products[J].Corrosion,1979,35(09):409-422. |
| [8] | AL-Hajji J A;Reda M R .Corrosion of Cu-Ni-Alloys in Sulfide-Polluted Seawater[J].Corrosion,1993,49(10):809-820. |
| [9] | 张其滨;火时中 .铜孔蚀的引发和扩展过程的研究[J].中国腐蚀与防护学报,1989,9(01):36-42. |
| [10] | Milosev I M;Vic M H;Drogowska M;at al .Brosard breakdown of passive film on copper in bicarbonate solution containing sulfate lions[J].Journal of the Electrochemical Society,1992,139(09):2409-2418. |
| [11] | Mattsson E.A Fredricksson Brit[J].Corrosion,1968(03):246. |
| [12] | Marcus P. .Surface science approach of corrosion phenomena[J].Electrochimica Acta,1998(1/2):109-118. |
| [13] | Feng Y;Siow K S;Teo W K et al.Corrosion Mechanisms and Products of Copper in Aqueous Solutions at Various pH Values[J].Corrosion,1997,53(05):389-398. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%