深海环境中304不锈钢腐蚀行为研究
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摘要
采用深海高效串型试验装置对深海环境中304不锈钢进行实海腐蚀实验,并利用SEM,EDS,EIS和XPS技术,分析了304不锈钢在1200,2000和3000 m海深下的腐蚀行为。结果表明:304不锈钢在深海中的腐蚀速率较小,在1200,2000和3000 m深度海水中暴露0.5 a的腐蚀速率分别为1.84,2.07和3.11μm/a,腐蚀速率随着海水深度的增加略微增大;各海水环境因素对304不锈钢深海腐蚀速率的影响程度由大到小为:压力>氧含量>电导率>温度>pH值;深海环境中,304不锈钢表面局部发生缝隙腐蚀,缝隙腐蚀深度随海水深度增加而加深;深海试样腐蚀产物主要是Fe_3O_4和NiO。
The real sea water corrosion behavior of 304 stainless steel was studied at different depths such as 1200, 2000 and 3000 m below sea level in the South China Sea via a home-made series cage-like equipment, as well as SEM, EDS, EIS and XPS techniques. The results show that: the corrosion rate of 304 stainless steel in deep sea is relatively small. The corrosion rates for 0.5 a at depths of 1200, 2000, and 3000 m below sea level are 1.84, 2.07, and 3.11 μm/a, respectively, and the corrosion rate slightly increases with the depth. The influence degree of seawater environmental factors on the corrosion rate of 304 stainless steel decreases in a descending order as follows: pressure, oxygen content,electrical conductivity, temperature, pH. Crevice corrosion occurs locally on the surface of 304 stainless steel and the depth of the crevice corrosion increases with the increasing depth. The corrosion products for the tested 304 stainless steel consist mainly of Fe_3O_4 and NiO.
The real sea water corrosion behavior of 304 stainless steel was studied at different depths such as 1200, 2000 and 3000 m below sea level in the South China Sea via a home-made series cage-like equipment, as well as SEM, EDS, EIS and XPS techniques. The results show that: the corrosion rate of 304 stainless steel in deep sea is relatively small. The corrosion rates for 0.5 a at depths of 1200, 2000, and 3000 m below sea level are 1.84, 2.07, and 3.11 μm/a, respectively, and the corrosion rate slightly increases with the depth. The influence degree of seawater environmental factors on the corrosion rate of 304 stainless steel decreases in a descending order as follows: pressure, oxygen content,electrical conductivity, temperature, pH. Crevice corrosion occurs locally on the surface of 304 stainless steel and the depth of the crevice corrosion increases with the increasing depth. The corrosion products for the tested 304 stainless steel consist mainly of Fe_3O_4 and NiO.
引文
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[2]Traverso P,Canepa E.A review of studies on corrosion of metals and alloys in deep-sea environment[J].Ocean Eng.,2014,87:10
[3]He X S,Lv P,He X,et al.New development of the research on corrosion of meatal structrues in deep-sea environment[J].Environ.Eng.,2014,32(S1):1020(何筱姗,吕平,何鑫等.关于深海环境下金属结构腐蚀的研究新进展[J].环境工程,2014,32(S1):1020)
[4]Huang Y Z,Dong L H,Liu B Y.Current status and development trend of study on corrosion of aluminum alloy in deep sea[J].Mater.Prot.,2014,47(1):44(黄雨舟,董丽华,刘伯洋.铝合金深海腐蚀的研究现状及发展趋势[J].材料保护,2014,47(1):44)
[5]Wei Y H,Lu J Z.Deep sea environment of carbon steel corrosion and protection[J].Total Corros.Control,2012,26(3):1(韦云汉,芦金柱.深海环境碳钢的腐蚀与防护[J].全面腐蚀控制,2012,26(3):1)
[6]Zhou J L,Li X G,Cheng X Q,et al.Research progress on corrosion of metallic materials in deep sea environment[J].Corros.Sci.Prot.Technol.,2010,22:47(周建龙,李晓刚,程学群等.深海环境下金属及合金材料腐蚀研究进展[J].腐蚀科学与防护技术,2010,22:47)
[7]Cao P,Zhou T T,Bai X Q,et al.Research progress on corrosion and protection in deep-sea environment[J].J.Chin.Soc.Corros.Prot.,2015,35:12(曹攀,周婷婷,白秀琴等.深海环境中的材料腐蚀与防护研究进展[J].中国腐蚀与防护学报,2015,35:12)
[8]He X S,Lv P,Chen K H,et al.New development about the research on corrosion and protection of metal structures in deep-sea environment[J].Shanghai Coat.,2014,52(4):40(何筱姗,吕平,陈凯华等.深海环境中金属腐蚀防护的研究新进展[J].上海涂料,2014,52(4):40)
[9]Sawant S S,Venkat K,Wagh A B.Corrosion of metals and alloys in the coastal and deep waters of the Arabian Sea and the bay of Bengal[J].Indian J.Technol.,1993,31:862
[10]Venkatesan R,Venkatasamy M A,Bhaskaran T A,et al.Corrosion of ferrous alloys in deep sea environments[J].Br.Corros.J.,2002,37:257
[11]Fan L,Ding K K,Guo W M,et al.Effect of hydrostatic pressure and pre-stress on corrosion behavior of a new type Ni-Cr-Mo-Vhigh strength steel[J].Acta Metall.Sin.,2016,52:679(范林,丁康康,郭为民等.静水压力和预应力对新型Ni-Cr-MoV高强钢腐蚀行为的影响[J].金属学报,2016,52:679)
[12]Xu L K,Li W J,Chen G Z.Deep sea corrosion test technique[J].Mar.Sci.,2005,29(7):1(许立坤,李文军,陈光章.深海腐蚀试验技术[J].海洋科学,2005,29(7):1)
[13]Guo W M,Li W J,Chen G Z.Corrosion testing in the deep ocean[J].Equip.Environ.Eng.,2006,3(1):10(郭为民,李文军,陈光章.材料深海环境腐蚀试验[J].装备环境工程,2006,3(1):10)
[14]Hou J,Guo W M,Deng C L.Influences of deep sea environmental factors on corrosion behavior of carbon steel[J].Equip.Environ.Eng.,2008,5(6):82(侯健,郭为民,邓春龙.深海环境因素对碳钢腐蚀行为的影响[J].装备环境工程,2008,5(6):82)
[15]Guo W M,Sun M X,Hou J,et al.Highly efficient bunch-style device for corrosion testing in deep sea environment[J].Equip.Environ.Eng.,2016,13(5):25(郭为民,孙明先,侯健等.高效串型深海环境腐蚀试验技术[J].装备环境工程,2016,13(5):25)
[16]Guo W M,Sun M X,Qiu R,et al.Research progress on corrosion and aging of materials in deep-sea environment[J].Corros.Sci.Prot.Technol.,2017,29:313(郭为民,孙明先,邱日等.材料深海自然环境腐蚀实验研究进展[J].腐蚀科学与防护技术,2017,29:313)
[17]Zheng J Q.Research of process of pitting corrosion of stainless steels in simulated deep-sea environment[D].Zhenjiang:Jiangsu University of Science and Technology,2011(郑家青.模拟深海环境下不锈钢点蚀性能研究[D].镇江:江苏科技大学,2011)
[18]He K,Wang L.Corrosion behavior of 316NG stainless steel in high pure water environment[J].Corros.Prot.,2016,37:631(何琨,王理.316NG不锈钢在高纯水环境中的腐蚀行为[J].腐蚀与防护,2016,37:631)
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