过去,合金元素对耐候钢海洋环境中的耐蚀性影响缺乏详细的论讨.选取Q235和5种不同Cu和Cr含量的耐候钢,在0.5%的NaCl溶液中模拟海洋大气环境进行周期浸润试验.研究结果表明:在Cl-存在的环境中,在碳钢的基础上单独添加Cr(0~3.0%)或单独添加Cu(0.25%~0.50%)都不能使钢的耐蚀性有显著的提高.单独提高耐候钢中Cr的含量,有助于抑制其在腐蚀初期的腐蚀速度,但对后期的腐蚀发展趋势不利;单独提高Cu的含量,有助于延缓腐蚀后期的发展趋势.当同时提高耐候钢中的Cu和Cr含量时,可使耐候钢得到较佳的耐大气腐蚀性能.XRD分析结果表明,合金元素对外锈层的成分影响不大,其主要大气腐蚀产物为γ-FeOOH,Fe3O4,γ-Fe2O3和少量α-FeOOH.
参考文献
[1] | Chen Y Y;Taeng H J;Wei L I et al.Corrosion resistance and mechanical properties of low-alloy steels under atmospheric conditions[J].Corrosion Science,2005,47(09):1 001-1 021. |
[2] | A.P. Yadav;A. Nishikata;T. Tsuru .Electrochemical impedance study on galvanized steel corrosion under cyclic wet-dry conditions-influence of time of wetness[J].Corrosion Science,2004(1):169-181. |
[3] | Amar Prasad Yadav;Atsushi Nishikata;Tooru Tsuru .Degradation mechanism of galvanized steel in wet-dry cyclic environment containing chloride ions[J].Corrosion Science,2004(2):361-376. |
[4] | Hoerle S;Mazaudier F;Dillmann P et al.Advances in understanding atmospheric corrosion of iron[J].Corrosion Science,2004,46(06):1 431-1 465. |
[5] | 刘丽宏,齐慧滨,卢燕平,李晓刚.耐大气腐蚀钢的研究概况[J].腐蚀科学与防护技术,2003(02):86-89. |
[6] | 张全成,吴建生,陈家光,李爱柏,杨晓芳,郑文龙,王建军.近海大气中耐侯钢和碳钢抗腐蚀性能的研究[J].材料科学与工程,2001(02):12-15,25. |
[7] | 耐候钢耐蚀性能的评定[J].北京科技大学学报,2005(05):549-551. |
[8] | Kimura M;Kihira H;Ohta N et al.Control of Fe(O,OH)6 nano-network structures of rust for high atmospheric-corro-sion resistance[J].Corrosion Science,2005,47(10):2 499-2 509. |
[9] | 曹楚南.中国材料的自然环境腐蚀[M].北京:化学工业出版社,2005:90-103. |
[10] | Yamashita M;Konishi H;Kozakura T et al.In-situ observation of initial rust formation process on carbon steel under-Na2SO4 and NaCl solution films with wet/dry cycles using synchrotron radiation X-rays[J].Corrosion Science,2005,47(10):2 492-2 498. |
[11] | 王建军;郭小丹;郑文龙 等.海洋大气暴露3年的碳钢与耐候钢表面锈层分析[J].腐蚀与防护,2002,23(07):288-291. |
[12] | Evans U R;Taylor C A J .Mechanism of atmospheric rusting[J].Corrosion Science,1972,12(03):227-246. |
[13] | Evans U R .Mechanism of rusting[J].Corrosion Science,1969,9(11):813-821. |
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%