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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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换热器T2紫铜管在潮湿状态下的腐蚀机理研究
DOI: 10.3724/SP.J.1037.2012.00114, PP. 815-821
Keywords: T2紫铜管,腐蚀,氧浓差电池,电偶电池
Abstract:
研究了换热器中的T2紫铜管在为期2年的保养中因受残留H$_{2}$O及挥发水蒸汽作用而出现泄漏降压的现象.利用SEM,OM和体视显微镜观察发现,在Cu管与不锈钢折流孔构成的所有缝隙部位都发生了严重的腐蚀,而且在少数位置发生了穿孔.润湿实验表明,T2紫铜管外表面与折流孔孔壁之间形成的缝隙足够小,以至于可以对Cu管外表面上结露的薄水膜产生虹吸作用,形成连接Cu管表面与折流孔孔壁的液体.因此,在Cu管外表面与缝隙部位Cu管间存在供氧差异,Cu管外表面为富氧区,而缝隙部位Cu管表面为贫氧区.电位监测结果表明表面带有氧化皮的外部Cu管的电极电位高于缝隙部位裸Cu管的电极电位,二者之间形成电偶电池,折流孔部位的Cu管表面为阳极区,外部Cu管表面为阴极区.供氧差异和电偶的联合作用是导致Cu管折流孔部位发生严重局部腐蚀的原因.
| [1] | Ji L N, Gong Y, Yang Z G. Microelectron Reliab, 2010; 50: 1163
|
| [2] | Khajavi M R, Abdolmaleki A R, Adibi N, Mirfendereski S. Eng Failure Analys, 2007; 14: 731
|
| [3] | Dorri M, Harandizadeh D. Eng Failure Analys, 2012; 19: 87
|
| [4] | Chandra K, Kain V, Dey G K, Shetty P S, Kishan R. Eng Failure Analys, 2010; 17: 587
|
| [5] | Lee S H, Kim J G, Koo F Y. Eng Failure Analys, 2010; 17: 1424
|
| [6] | Pantazopoulos G, Vazdirvanidis A, Tsinopoulos G. Eng Failure Analys, 2011; 18: 649
|
| [7] | Edwards M, Ferguson J F, Reiber S H. J AmWaterWorks Assoc, 1994; 87(7): 74
|
| [8] | McDougall J L, Stevenson M E. J Failure Analys Prev, 2005; 5(1): 13
|
| [9] | Stevenson M E, Barkey M E, McDougall J L. J Failure Analys Prev, 2005; 5(6): 25
|
| [10] | Duffner D H. J Failure Analys Prev, 2005; 5(1): 79
|
| [11] | Pantazopoulos G, Tsinopoulos G. J Failure Analys Prev, 2006; 6(6): 8
|
| [12] | Kuznicka B. Eng Failure Analys, 2009; 16: 2382
|
| [13] | Olszewski A M. J Failure Analys Prev, 2007; 7(4): 238
|
| [14] | Itoh M, Minato A, Aizawa M, Tanno K. Boshoku Gijtsu, 1984; 33: 504
|
| [15] | Levine R S. Plant Eng, 1978; 32: 101
|
| [16] | Baba H, Kodama T, Fujii T. Trans Natl Res Inst Met, 1986; 28: 248
|
| [17] | Christy A G, Lowe A, Otieno-Alego V, Stoll M, Webster R D. J Appl Electrochem, 2004; 34: 225
|
| [18] | Sequeira C A C. Br Corros J, 1995; 30: 137
|
| [19] | Sosa M, Patel S, Edwards M. Corrosion, 1999; 55: 1069
|
| [20] | Edwards M, Rehring J, Mayer T. Corrosion, 1994; 50: 366
|
| [21] | Fujii T, Kodama T, Baba H. Corros Sci, 1984; 24: 901
|
| [22] | Drogowska M, Brossard L, M′enard H. Surf Coat Technol, 1988; 34: 383
|
| [23] | Fernandes P J L. Eng Failure Analys, 1998; 5: 35
|
| [24] | Myers J R, Cohen A. Mater Performance, 1995; 34(10): 60
|
| [25] | Mattsson E. Br Corros J, 1980; 15: 6
|
| [26] | Huang N B, Liang C H. Refrigeration, 2001; 20(2): 25
|
| [27] | (黄乃宝, 梁成浩. 制冷. 2001; 20(2): 25)
|
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