Raman Spectroscopic Study on Mechanism of Aluminum Triphosphate Pigment

应用拉曼光谱研究了含有防锈颜料涂装特性的钢样 ,在此基础上探讨了三聚磷酸铝防锈颜料对A3钢的保护机理 .三聚磷酸铝溶解后能到达钢样表面 ,其离子可与铁离子化合形成三聚磷酸铁 .三聚磷铁能缓慢地通过化学键牢固地附着在钢样表面 ,最终在钢表面形成一层隔绝腐蚀介质和钢样的紧蜜保护膜阻止了腐蚀的继续发生从而达到保护的目的The painted steel sample whose coating contained anticorrosive pigment has been investigated by Raman spectroscopy.The protective mechanism of aluminum triphosphate pigment for A3 steel is proposed as follows: Aluminum triphosphate can be dissolved and arrive at the surface of the steel.The dissolved triphosphate ions can complex with ferric ions.And the new products,namely ferric triphosphate,can strongly adhere at the surface of the steel by chemical bonds slowly.At last,a compact protective film,which effectively separates the steel substrate from the aggressive media,is formed at the steel surface.作者联系地址：中国科学院福建物质结构研究所,中国科学院福建物质结构研究所,中国科学院福建物质结构研究所,中国科学院福建物质结构研究所,中国科学院福建物质结构研究所 福建厦门361012 ,福建厦门361012 ,福建厦门361012 ,福建厦门361012 ,福建厦门361012Author's Address: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences,Xiamen 361012,Chin

Electrochemical Impedance Spectroscopy Studies on Inhibitive Performance of Aluminum Triphosphate Pigment

利用电化学阻抗谱研究了方解石及三聚磷酸铝环氧涂层的耐蚀性能 ,并提出了它们的作用机理 .结果表明 ,方解石只起体质颜料作用 ,不具备缓蚀性能 ;而三聚磷酸铝因在钢基表面作用形成致密的保护膜则表现出优良的缓蚀性能 .The epoxy coatings on A3 steel sheets containing calcite or aluminum triphosphate (AlTP), were investigated by Electrochemical Impedance Spectroscopy (EIS). The results showed that calcite pigment is not an inhibitor, but an extender pigment, and that AlTP pigment can considerably enhance the protective performance of epoxy coating. The triphosphate ion at the interface between the steel substrate and the coating can complex with the corrosion product, such as ferric and ferrous ions, and form a compact protective film which effectively separates the steel substrate from the aggressive media.作者联系地址：中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012Author's Address: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Xiamen, 361012,Chin

EFFECT of ION-SELECTIVE PHENOLIC COATINGS ON ELECTRO-CHEMICAL BEHAVIOUR of COPPER IN 3% NaClSOLUTION

利用掺杂离子交换体制备了含不同交换离子品种的阴离子选择性、阳离子选择性和双极性酚醛涂层,研究了涂装不同离子选择性酚醛涂层的铜电极在3%nACl溶液中的腐蚀电化学行为,讨论了各种离子选择性涂层对铜防护性能的差别,并与没有离子选择性的涂层作了比较。Anion-selective, cation-selective and bipolar phenolic coatings were prepared by mixing phenolic varnish with ion exchangers.MoO42- anion exchanger resin and ammonium molybdophosphate were utilized as anion and cation exchangers respectively.The bipolar coating consisted of an anion-selective inner layer on the metal side and a cation-selective outer layer on the solution side.The polarization curves and Nyquist plots of copper electrodes covered with various ion-selective phenolic coatings and nonionic-selective phenolic coating as contrast in 3% NaCl solution were measured by poltentio-dynamic method and EIS technique.The results indicated that, compared with the nonionic- selective coating, the anion-selective coating accelerated the propagation of metal corrosion, cation-selective coating decelerated corrosion propagation, and bipolar coating was the most corrosion-resistant among the Four types of phenolic coatings.With the bipolar coating, the anodic current was greatly suppressed, while no current blockage occurred in the cathodic direction.Thus there arose rectiFication of ion movement retarding the ionic current in the anodic direction.The rectiFication phenomenon blocked the Flow of anodic ion transport and led to metal passivation.This showed that the bipolar coating possessed some Function of passivation membrane and had important eFFect on the process of anodic dissolution.国家自然科学基金资助项目;金属腐蚀与防护国家重点实验室课

A Study on AntiCorrosion Performance of IonSelective Phenolic Coatings for Carbon Steel by EIS

研究了涂有不同离子选择性酚醛层的碳钢试样在3%nACl溶液中的电化学交流阻抗谱，用不同的等效电路解析了不同涂层体系的频谱行为，讨论了不同离子选择性涂层对碳钢的防腐蚀性能，分析了各自的耐蚀机理。结果表明，双极性和阳离子选择性酚醛涂层对碳钢的防腐蚀性能比酚醛清漆好，而阴离子选择性酚醛涂层比酚醛清漆差。Abstract The anticorrosion performance of carbon steel painted with anionselective,cationselective and bipolar phenolic coatings,and phenrolic varnish (nonionicselective phenolic coating) as contrast in 3% NaCl solution,was investigated by electrochemical impedance spectroscopy (EIS) technique.The results showed that compared with nonionicselective phenolic coating, the anionselective phenolic coating accelerates the propagation of metal corrosion, whereas cationselective phenolic coating decelerates corrosion propagation, and bipolar phenolic coating is the most corrosionresistance among the fur types of phenolic coatings.国家自然科学基金;中国科学院腐蚀与防护国家重点实验室课

Electrochemical and Corrosion Behaviour of A3 Steel Covered With Ion selective Organic Coating

采用动电位扫描极化曲线和电化学交流阻抗技术，研究了A3钢表面涂装阴离子选择性、阳离子选择性和双极性有机涂层在3%nACl溶液中的腐蚀和电化学行为，分析了不同离子选择性涂层对A3钢防蚀性能的差别，并探讨了其耐蚀机理Potentiodynamic method and electrochemical impedance spectroscopy technique were empoloyed to study the corrosion electrochemical behaviour of A3 steel covered with anion selective、 cation selective and bipolar organic coating ,and phenolic varnish (nonionic selective organic coating) as contrast, in 3% NaCl solution.The results indicate that,compared with phenolic varnish,anion selective organic coating accelerates the propagation of metal corrosion,whereas cation selective organic coating decelerates corrosion propagation, and bipolar organic coating is of the most corrosion resistance among the Four type organic coatings.国家自然科学基金;中国科学院腐蚀与防护国家重点实验室课

Corrosion Behaviour of Copper Covered With Ion selective Phenolic Coatings by EIS

用电化学交流阻抗技术研究了涂装不同离子选择性涂层的铜电极在３％ＮａＣｌ溶液中的腐蚀行为，根据不同涂装体系的阻抗谱特征，建立了相应的等效电路模型，由阻抗数据解析的结果，讨论了不同离子选择性涂层对铜的防蚀性能．结果表明，离子选择性涂层的组成和结构对铜的腐蚀行为影响很大，由阴离子选择性内层和阳离子选择性外层构成的双极性涂层具有优异的防蚀性能．Electrochemical impedance spectroscopy(EIS) technique was employed to study the corrosion behaviour of copper painted with the anion selective、 cation selective and bipolar phenolic coatings in 3% NaCl solution. From the impedance spectrum characteristics, the models of equivalent circuit for these different coating systems were established,and the methods for the analysis of experimental impedance diagrams in terms of coating and interface properties were discussed. The research results show that the composition and structure of ion selective coatings have significant influence on corrosion behaviour of copper. The bipolar coating consisting of an anion selective inner layer and a cation selective outer layer possesses excellent corrosion resistance.作者联系地址：固体表面物理化学国家重点实验室厦门大学化学系,中国科学院福建物质结构研究所二部Author's Address: State Key Lab. for Phys. Chem. of the Solid Sur., Dept. of Chemistry, Xiamen Univ., Xiamen 361005 Gu Zhijun Zhang Zhigang Su Fangten

Application of Inhibitor to Improve the Anticorrosion Performance of Electrophoretic Coating

在电泳涂装工艺中使用缓蚀剂，可提高阳极电泳涂层的防腐蚀性。实验表明，沥青电泳漆与缓蚀剂的电泳共沉积涂层对基底金属具有较高的防护性能．探讨了共沉积涂层中缓蚀剂的缓蚀机理。To improve the anti-corrosion performance of electrocoating,organic andinorganic inhibitors are applied in an anodic electrophoretic-coating.The results show that thedeposition of polymer with zinc phospate exhibits a high inbihition efficiency.The inhibitionmechanism of the inhibitor in electrocoating has been studied.作者联系地址：中国科学院福建物构所二部，十堰第二汽车制造厂Author's Address: Fujian Institute of Research on the & Structure of Matter,Chinese Academy of Sciences,Xiamen,361012Liu Renxin;Tian WeidongNo.2 Auto Manufactory, Shi Yan 44204

Electrochemical Impedance Spectroscopy Study on A3 Steel in Anti-corrosive Pigment Extract Solution

应用EIS研究了A3钢在不同 pH值的磷酸锌或三聚磷酸铝 3.5 %NaCl提取液中的腐蚀行为 .结果显示 ,相同条件下 ,A3钢的电阻值随溶液 pH值增加而增加 ,电容值则相反 .在磷酸锌3.5 %NaCl提取液中 ,因磷酸锌的溶解度太小 ,没有足够的量对金属基底A3钢进行有效的保护 .在 pH值为 6的三聚磷酸铝 3.5 %NaCl提取液中 ,A3钢表现出较明显的缓蚀现象 ,可能是因为三聚磷酸根离子与腐蚀产物Fe2 + 、Fe3+ 络合并在钢表面形成了一层致密的保护膜 ,从而有效地阻止了腐蚀介质的进一步入侵 .防蚀颜料的溶解度大小是决定它的缓蚀性能优劣的重要因素之一The corrosion behaviors of A3 steel in different pH, 3.5%NaCl, modified zinc phosphate and aluminum triphosphate extract solutions have been studied by EIS. Results show:(a) The resistance increases with the increase of pH value under the same circumstances, but the capacity is the reverse.(b) Zinc phosphate, because of its low solubility, shows no inhibitive performance for A3 steel in 3.5% NaCl extract solutions. (c) Aluminum triphosphate has good inhibitive performance for A3 steel in 3.5% NaCl extract solutions at a pH of 6, probably because the triphosphate ion can complex with the corrosion_product, such as ferric and ferrous ions, and form a compact protective film that separates effectively the steel substrate from the aggressive media at the steel surface. (d) The solubility of the anticorrosive pigment is one of the most important factors for its inhibitive performance.作者联系地址：中科院福建物质结构研究所二部!福建厦门361012,中科院福建物质结构研究所二部!福建厦门361012,中科院福建物质结构研究所二部!福建厦门361012,中科院福建物质结构研究所二部!福建厦门361012,中科院福建物质结构研究所二部!福建厦门361012,厦门大学固体表面物理化学国家重点实Author's Address: 1.Fujian Inst. of Res. on the Structure of Matter, Chinese Academy of Scie., Xiamen, 361012, China; 2. State Key Lab. for Phys

Studies of Electrochemical Impedance Spectroscopy on Coated Steel with Artificial Defect

利用交流阻抗技术快速评价人工破损涂层的性能 ,并探讨颜料的防锈作用机理Electrochemical Impedance Spectroscopy (EIS) was applied to rapidly evaluate the performance of organic coatings and the characterization of the protective properties of anticorrosive pigments in the presence of artificial defect in organic coatings. The results showed that artificial defect method can rapidly evaluate the performance of coatings and discriminate whether the pigments in the coatings have inhibitive.作者联系地址：中国科学院福建物质结构研究所二部!福建厦门361012;厦门大学固体表面物理化学国家重点实验室,福建厦门361005,中国科学院福建物质结构研究所二部!福建厦门361012;厦门大学固体表面物理化学国家重点实验室,福建厦门361005,中国科学院福建物质结构研究所二部!福建厦门361012;厦Author's Address: Fujian Inst. of Res. on the Structure of Matter, Chinese Acad. of Sci., Xiamen 361012, China; State Key Lab. for Phys. Chem.. of Solid Surfaces, Xiame