采用改进的双面电解池检测热镀锌钢材在恒温30 ℃、不同湿度条件下的氢渗透电流,并结合慢应变速率拉伸和断口形貌分析,研究其在海洋大气环境中的氢脆敏感性.结果表明:在相对湿度小于70%时,热镀锌钢材未检测到明显的氢渗透电流,但随着湿度的增加,氢渗透电流密度逐渐增大;当镀层存在缺陷时,镀锌层在为钢材基体提供阴极保护的同时也会促进氢向钢材基体中渗透,且氢渗透电流密度的最大值随镀层缺陷面积的增加而降低;氢吸收和氢渗透降低了热镀锌钢材的断后伸长率,导致其断口切边处出现少量撕裂棱,表明热镀锌钢材在高温、潮湿的海洋大气中使用时,其氢脆敏感性将有所提高.
参考文献
| [1] | 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. |
| [2] | GRAEDEL T E .Corrosion mechanisms for zinc exposed to the atmosphere[J].Journal of the Electrochemical Society,1989,136(04):C193-C203. |
| [3] | TOMASHOV N D .Mechanism of electrochemical corrosion of metals under insulating coating.2.Kinetics of cathodic processes on insulated metals in electrolytes[J].Corrosion,1964,20(07):T218-T222. |
| [4] | NEUFELD A K;COLE L S;BOND A M;FURMAN S A .The initiation mechanism of corrosion of zinc by sodium chloride particle deposition[J].Corrosion Science,2002,44(03):555-572. |
| [5] | 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. |
| [6] | LIN K L;YANG C F;LEE J T .Correlation of microstructure with corrosion and electrochemical behavior of batch-type hot-dip Al-Zn coatings:Part I.Zn and 5%Al-Zn coatings[J].Corrosion,1991,47(01):9-17. |
| [7] | 廖景娱.金属构件失效分析[M].北京:化学工业出版社,2003:211-212. |
| [8] | GB/T 228-2002.GB/T 228-2002.金属材料-室温拉伸试验方法[S].,2002. |
| [9] | 王佳.无机盐微粒沉积和大气腐蚀的发生与发展[J].中国腐蚀与防护学报,2004(03):155-158. |
| [10] | 张际标,王佳,王燕华.海盐粒子沉积下碳钢的大气腐蚀初期行为[J].海洋科学,2005(07):17-20. |
| [11] | DEHRI I;ERBIL M .The effect of relative humidity on the atmospheric corrosion of defective organic coating materials:An EIS study with a new approach[J].Corrosion Science,2000,42(06):969-978. |
| [12] | D. H. Coleman;B. N. Popov;R. E. White .Hydrogen permeation inhibition by thin layer Zn-Ni alloy electrodeposition[J].Journal of Applied Electrochemistry,1998(9):889-894. |
| [13] | A. P. Yadav;H. Katayama;K. Noda;H. Masuda;A. Nishikata;T. Tsuru .Surface potential distribution over a zinc/steel galvanic couple corroding under thin layer of electrolyte[J].Electrochimica Acta,2007(9):3121-3129. |
| [14] | HACK H P.Corrosion testing made easy:Galvanic corrosion test methods[A].Houston:NACE International,1993 |
| [15] | KIM H;POPOV B N;CHEN K S .Comparison of corrosion-resistance and hydrogen permeation properties of Zn-Ni,Zn-Ni-Cd and Cd coatings on low-carbon steel[J].Corrosion Science,2003,45(07):1505-1521. |
| [16] | Reumont G.;Iost A.;Foct J.;Vogt JB. .The effects of an Fe-Zn intermetallic-containing coating on the stress corrosion cracking behavior of a hot-dip galvanized steel[J].Surface & Coatings Technology,2001(2/3):265-271. |
| [17] | 王佳 .使用Kelvin探头参比电极技术进行薄液层下电化学测量[J].中国腐蚀与防护学报,1995,15(03):173-179. |
| [18] | Eiji Tada;Satomi Satoh;Hiroyuki Kaneko .The spatial distribution of Zn{sup}(2+) during galvanic corrosion of a Zn/steel couple[J].Electrochimica Acta,2004(14):2279-2285. |
| [19] | ZHENG Chuan-bo;HUANG Yan-liang;YU Qing .Hydrogen permeation behavior and corrosion monitoring atmospheric of steel in cyclic wet-dry environment[J].Materials and Corrosion,2007,58(09):696-700. |
| [20] | 刘白.氢对位错运动的影响[J].材料科学与工程,2001(01):63-66. |
| [21] | Y. Liang;D.C. Ahn;P. Sofronis;R.H. Dodds Jr.;D. Bammann .Effect of hydrogen trapping on void growth and coalescence in metals and alloys[J].Mechanics of materials,2008(3):115-132. |
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%