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改性壳聚糖衍生物以及CTS-IA-AA对不同钢材的缓蚀性 能研究
冯盼盼
学位类型硕士
导师李言涛
2017-05-12
学位授予单位中国科学院大学
学位授予地点北京
学位专业海洋金属腐蚀与防护
关键词缓蚀剂 海水 钨酸钠 阴极保护 金属材料
摘要每年因腐蚀会造成大量的金属材料的损失,直接经济损失相当严重。空气含有大量的氧和水分,为金属材料的腐蚀营造了优良的天然环境。中国是海洋大国,大陆架的浅海区蕴藏了丰富的海洋资源,非常有利于开发。海上作业平台以及各种类型的海上工作设备绝大部分是由金属材料制成,海水中含有各种各样大量的腐蚀性较强的物质,更容易造成腐蚀损失。因此,开发绿色、环保、无污染的天然有机物作为缓蚀剂得到金属腐蚀与防护领域研究人员的广泛关注。
本文系统研究了一种天然有机物-甲壳素的衍生物(CMCS)作为缓蚀剂对于金属材料海水或人造海水中的缓蚀作用,以及该种衍生物与阴极保护联合对于金属材料的保护作用。另外研究了一种环保有机高聚物作为缓蚀剂对于金属材料的保护作用。采用的实验手段主要有失重实验,电化学实验,主要包括极化曲线、交流阻抗谱,检测手段包括扫描电子显微镜(SEM),X-射线衍射(XRD)以及傅里叶红外光谱(FTIR)。结果表明,CMCS可以缓解金属材料X70钢在海水中的腐蚀,CMCS和钨酸钠作为复配缓蚀剂对X70钢在海水中的腐蚀具有很好的协同保护作用;缓蚀剂的复配和阴极保护对X70钢具有很好的协同保护效果。钙质沉积层只在空白海水中的试样表面形成,当CMCS和钨酸钠存在时不能形成,但是也没有腐蚀的痕迹。作为一种有机高聚物,CTS-IA-AA对于304不锈钢在3.5%氯化钠溶液中发生的腐蚀来说,是一种有效的以阳极型为主的混合型缓蚀剂。在一定范围内,CTS-IA-AA的缓蚀效率随浓度和温度的变化而变化。缓蚀剂在金属表面的吸附符合郎格缪尔吸附模型,并且是化学吸附。金属由于缓蚀剂在其表面的吸附从而减弱金属表面的腐蚀和吸氧反应得到保护。
其他摘要
The corrosion of metal materials cause huge losses, and the direct economic losses is very serious. Air contains a lot of oxygen and moisture, which build an excellent natural environment for corrosion of metal material. China is a maritime power, most part of abundant marine resources are in the shallow water area of the continental shelf, and are easy for development. Most part of shore platform, as well as various types of maritime work equipment are made of metal materials, and the seawater contains a large number of corrosive medium, are more likely to cause corrosion damage. Thus, researchers focused on the field of metals corrosion and protection pay great attention to the development of green, pollution-free natural organic compounds as corrosion inhibitor.
This work systematically studied a natural organic-chitin’s derivatives, made them as corrosion inhibitor to protect the metal materials in corrosive medium, such as the artificial seawater or the sea water, and its derivatives with cathodic protection for metal protection.  In addition, we studied a green organic polymers as corrosion inhibitor for metal protection. The experimental means mainly include weightlessness experiment, electrochemical experiments (polarization curve, impedance spectroscopy), scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier infrared spectrum (FTIR).The results show that CMCS could inhibit the corrosion of X70 in seawater. CMCS and Na2WO4 show good synergies as corrosion inhibitor for X70 pipeline steel in seawater. Inhibition of combined corrosion inhibitor and cathodic protection shows a good synergistic effect on the protection of X70 pipeline steels. Calcareous deposit only forms on the metal surface in blank seawater, but cannot form in the presence of CMCS and Na2WO4, and there was no sign of corrosion. As a terpolymer, the CTS-IA-AA is an effective inhibitor which act as a modest anodic inhibitor and not much of

cathodic inhibitor for the stainless steel in 3.5% sodium chloride solution. The inhibition efficiencies of CTS-IA-AA depend on their concentrations and temperature in a certain range. The adsorption of the inhibitors on metal surface obeys the Langmuir adsorption isotherm and chemisorption, and the metal surface was protected through the adsorption of the inhibitor on its surface, thereby reducing both metal corrosion and oxygen evolution.
学科领域海洋科学
语种英语
文献类型学位论文
条目标识符http://ir.qdio.ac.cn/handle/337002/136602
专题其他
海洋腐蚀与防护研究发展中心
作者单位1.中国科学院海洋研究所
2.中国科学院大学
推荐引用方式
GB/T 7714
冯盼盼. 改性壳聚糖衍生物以及CTS-IA-AA对不同钢材的缓蚀性 能研究[D]. 北京. 中国科学院大学,2017.
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