增甘膦及复配液缓蚀性能研究

目的合成增甘膦,研究增甘膦及其复配液缓蚀性能。方法以亚磷酸、甲醛、甘氨酸为原料,在酸性条件下,合成增甘膦。通过塔菲尔曲线法和电化学阻抗谱,测试酸性条件下LY12硬铝在增甘膦溶液中的缓蚀性能,并与同类有机膦系缓蚀剂氨基三甲叉膦酸(ATMP)进行比较。同时,在碱性条件下,测试LY12硬铝在增甘膦复配液中的缓蚀性能。结果当p H=1,增甘膦缓蚀液质量分数为0.5%时,缓蚀率可达90%。在相同酸性条件及缓蚀剂含量下,增甘膦缓蚀效果较ATMP好。在碱性条件下,增甘膦单独使用缓蚀效果不佳,与三乙醇胺复配后缓蚀效果较好。当增甘膦与三乙醇胺复配含量为0.5%(质量分数)三乙醇胺+0.4%(质量分数)增甘膦时,LY12硬铝在p H=8.7体系中的缓蚀率为65.5%。结论增甘膦单独使用,在酸性条件下有很好的缓蚀效果;与三乙醇胺复配后,在碱性条件下也有较好的缓蚀效果。     

一种新型YWY有机膦缓蚀剂

研制了一种新型YWY有机膦缓蚀剂，应用重量法、电化学方法及扫描电镜等手段对合成的有机膦缓蚀剂YWY在苦咸水条件下的缓蚀性能及其缓蚀机理进行了研究。实验表明，该缓蚀剂可与碳钢表面螯合形成致密的覆盖膜，表现出明显的阴极型缓蚀剂特征。在缓蚀剂浓度大于12mg／L时，可使氯离子浓度大于30000mg／L的苦咸水／碳钢体系腐蚀速率降至0．03mm／a以下，达到国家耐蚀级标准。     

缓蚀剂构效关系的量子化学研究

用量子化学半经验算法AM1方法,在6-31G基组水平上,对十二种N-芳基-α-氨基苄基膦酸缓蚀性能与分子结构的关系进行了研究,讨论了量子化学计算结果与缓蚀性能的关系。结果表明,这些缓蚀剂的缓蚀效率与分子的最高占据轨道能量EHOMO、氮原子的净电荷、苯环碳原子净电荷之间有很好的相关性,并讨论了缓蚀机理。     

一种新型酮醛胺酸化缓蚀剂的合成及性能研究

介绍了一种新型酸化缓蚀剂的合成方法、缓蚀性能,并分析了其缓蚀机理。利用酮醛胺的缩合反应,筛选最佳反应条件,合成一种曼尼希碱,在15%盐酸（90℃）中的缓蚀率达到99.74%,超过了酸化缓蚀剂评价标准SY/T54JD5-1996规定的一级水平 在90℃土酸（7.5%HCl＋1.5%HF）中的缓蚀率达到99.44%,也达到了酸化缓蚀剂评价标准规定的一级水平,与碘化物、炔醇及六次甲基四胺复配后所得缓蚀剂性能超过了该标准的一级水平。     

含氯N-芳基-α-氨基苄基膦酸的合成及其对钢铁缓蚀性能的研究

合成了四个新的含氯N-芳基-α-氨基苄基膦酸缓蚀剂,用元素分析、红外分析、1HNMR、31P NMR(核磁共振)确定了它们的结构,并用静态腐蚀实验(失重法)研究其在不同浓度及pH条件下对钢铁的缓蚀性能.     

含氯N—芳基—α—氨基苄基磷酸的合成及其对钢铁缓蚀性能的研究

合成了四个新的含氯N—芳基—α—氨基苄基膦酸缓蚀剂，用元素分析、红外分析、^1HNMR、^31PNMR(核磁共振)确定了它们的结构，并用静态腐蚀实验(失重法)研究其在不同浓度及pH条件下对钢铁的缓蚀性能。     

20钢在含甲醇污水中的缓蚀剂选择及其缓蚀性能

为了减缓甲醇回收系统的腐蚀,通过失重法对20钢在含甲醇模拟污水中的缓蚀剂进行了筛选及优化,并通过极化曲线法研究了缓蚀剂的缓蚀性能;通过能谱(EDS)分析和阻垢性能试验研究了缓蚀剂的阻垢性能。结果表明:聚磷酸钠、有机膦A和ZnCl_2以质量比2∶1∶2复配,且该复合缓蚀剂用量为90mg/L时,缓蚀性能最好,缓蚀率达到95.47%;该复合缓蚀剂是抑制电极阳极反应为主的混合型缓蚀剂;含磷缓蚀剂在20钢表面形成膜从而有效地阻挡了腐蚀介质对基体的腐蚀,且该复合缓蚀剂具有较好的阻垢作用,阻垢率达83.33%.     

一种海水缓蚀剂缓蚀行为的研究

利用电化学方法和表面分析测试技术，研究了有机膦酸醇酯类缓蚀剂(YKI-05)对于907A钢在天然海水中的缓蚀行为．实验表明，在静态海水中，浓度为300mg／L的YKI-05缓蚀剂能在907A钢表面形成稳定的缓蚀膜层，是一负催化阴极型缓蚀剂，在实验周期内其对907A钢的缓蚀效率较高；并用原子力显微镜(AFM)和俄歇电子能谱(AES)对该缓蚀膜的表面形貌和成分进行分析．     

N-磺酸基-氨基二甲叉膦酸缓蚀阻垢剂缓蚀作用的研究

合成了一种新型有机多元膦酸－－Ｎ－磺酸基－氨基二甲叉膦酸（ＳＡＤＰ）,了它在０．１０ｍｏｌ／Ｌ硫酸溶液中对０Ｃｒ１３不锈钢的缓蚀作用,并 外两种常用的有机多元膦酸;氨基三甲叉膦酸（ＡＴＭＰ）和羟基乙叉二膦酸（ＨＥＤＰ）进行了对比。结果表明：它们对不锈钢的缓蚀作用机理主要是吸附覆盖作用,Ｌａｎｇｍｕｉｒ吸附ＳＡＤＰ的缓蚀性能优于ＡＴＭＰ和ＨＥＤＰ。其缓蚀能力次序为：ηＳＡＤＰ〉ηＡＴＭＰ〉ηＨＥＤＰ     

新型固体复合缓蚀剂对20碳钢在酸洗液中的缓蚀性能研究

以固体间苯二胺、硫氰酸钾及乌洛托品为原料研制了一种新型固体复合型缓蚀剂,并利用静态失重法、Tafel极化曲线、电化学阻抗研究了其在10%HCl溶液、10%H2SO4溶液、10%HNO3溶液中对20碳钢的缓蚀行为。结果表明,在上述3种酸溶液中,添加0.5%的新型固体复合型缓蚀剂即可使20碳钢的缓蚀率全部达到80%以上,其中在10%HNO3溶液中,20碳钢的缓蚀率可以达到99.1%。Tafel极化曲线及电化学阻抗也表明该缓蚀剂的加入显著地抑制了20碳钢在酸溶液中的腐蚀速率,说明该缓蚀剂能够在20碳钢的表面形成缓蚀性能优良的保护膜。     

Titanium-zirconium-phosphonate hybrid film on 6061 aluminum alloy

Three titanium-zirconium-phosphonate hybrid films were formed on AA6061 aluminum alloy by immersing in fluorotitanic acid and fluorozirconic acid based solution containing different phosphonic acids for protective coatings of aluminium alloy.The corrosion resistance of three hybrid films as the substitute for chromate film were evaluated and compared.The neutral salt spray test was explored,the immersion test was conducted and electrochemical test was also executed.The hybrid films exhibited well-pleasing c...     

DETAPP在低温磷化工艺中的作用

以二乙撑三胺,甲醛,亚磷酸为原料合成二乙撑三胺五甲撑基膦酸,并将其添加剂低温磷化工艺中。我们发现在低温磷化工艺中添加ＤＥＴＡＰＰ能明显地提高磷化后钢铁的耐蚀性和耐磨性。其机理在于这种有机膦酸能与Ｚｎ＾２＋,Ｆｅ＾３＋等螯合附集在钢铁表面形成一层耐蚀性的膜。     

新型咪唑啉衍生物油田注水缓蚀剂的研究

使用长链脂肪酸、多胺、甲醛和三氯化磷等为原料合成了咪唑啉有机膦酸类缓蚀剂。在模拟油田注水条件下，采用静态挂片、极化曲线和交流阻抗等测试方法评价了缓蚀剂的缓蚀性能，并对缓蚀剂的成膜机理进行了一些研究与探讨。     

A231镁合金表面阳极氧化工艺研究

采用正交设计方法,研究了AZ31镁合金表面阳极氧化工艺配方.采用扫描电镜(SEM)、能谱分析仪(EDS)、X射线衍射法(XRD)、动电位极化曲线测量方法评价了优化工艺配方条件下阳极氧化膜的微观成分结构及其耐蚀性能.结果表明:经优化配方阳极氧化处理可以显著改善AZ31镁合金的耐腐蚀性能,且经沸水封孔处理可以有效地封闭氧化膜中的裂纹,进一步提高膜层的耐腐蚀性能.     

Structural investigation of the zirconium-titanium based amino trimethylene phosphonate hybrid coating on aluminum alloy

A zirconium-titanium based amino trimethylene phosphonate hybrid coating on AA6061 aluminum alloys was formed by dipping in a fluorotitanate/zirconate acid and amino trimethylene phosphonic acid (ATMP) solution for improving the lacquer adhesion and corrosion resistance as a substitute of chromate coatings. The morphol-ogy and structure of the hybrid coating were studied by means of scanning electror microscopy (SEM) and atomic force microscopy (AFM). The surface compositior and structure characteristics were also investigated by means of X-ray photoelectron spectroscopy (XPS) and Fourier transformation infra-red spectroscopy (FTIR). The results of SEM and AFM show that the hybrid coating present piece particle distrib-ution which is much denser than that of the zirconium-titanium coating. The results of XPS and FTIR indicate that the hybrid coating is a hybrid composite structure composed of both the zirconium-titanium and amino trimethylene phosphonate coat-ings.     

表面分析技术在钨酸盐缓蚀机理研究中的应用

钨酸盐单独使用及与其它组分复配使用时均有缓蚀作用。本文简要介绍了钨酸盐作为缓蚀剂的主要应用领域。综述了表面分析技术（包括椭圆偏振法，Ａｕｇｅｒ能谱、ＸＰＳ及卢瑟夫背散射能谱）在钨盐缓蚀作用机理研究中的应用，并对分析结果及存在的问题进行了讨论。     

CORROSION BEHAVIOR OF A ZIRCONIUM-TITANIUM BASED PHOSPHONIC ACID CONVERSION COATING ON AA6061 ALUMINIUM ALLOY

The conversion coating was formed by dipping AA6061 in a fluorotitanate/zirconate acid and amino trimethylene phosphonic acid （ATMP） solution at room temperature. The formation process and the anti-corrosion performance of the conversion coating were investigated using electrochemical test and salt spray test （SST）, respectively. The electrochemical test shows that the Zr/Ti and ATMP coating improves the corrosion resistance of AA6061 as good as the chromate （VI） coating. But the results of SST show that the corrosion resistance of Zr/Ti and ATMP coating is not as good as the chromate （VI） coating. The corrosion area is less than 2% after 72 h.     

Untersuchung vielkomponentiger,Nitrilotrimethylenphosphonsäure enthaltender Systeme als Inhibitoren für den Metallschutz in neutralen wäßrigen Medien

Study of multicomponent systems containing nitrilo-trimethylene phosphonic (NTMP) acid as inhibitors for the protection of metals in neutral aqueous media The inhibitor mixtures studied contain nitrilo-trimethylene phosphonic acid, oxalic acid or phthalic acid anhydride and zinc sulfate. On the basis of the measurement of the differential electric double-layer capacity using the bridge method the thermodynamic characteristics of the adsorption of the compounds studied and their mixtures on the surface of armco iron have been determined in aqueous potassium fluoride solutions. The best inhibitor mixture was then used as the starting material for optimizing the composition ratios. Using gravimetric techniques the influence of this mixture on the rate of corrosion of steel ST3S in simulated industrial water of variable chemical composition and in water being chlorinated. In addition the influence of this mixture on the rate of corrosion of copper (Cu 99,9 E), brass (CuZn 37), zinc (97,5) and aluminum alloy (AlCu4Mg1) has been studied as well and considerable decrease of the corrosion rate by the inhibitor mixtures has been established. Nitrilo-trimethylene phosphonic acid, in combination with phthalic acid anhydride and zinc ions can therefore be considered as a perspective inhibitor for the corrosion protection of industrial cooling and heating water installations.     

A comparative study of molybdate/silane composite films on galvanized steel with different treatment processes

Two types of molybdate/silane composite films were obtained on the surface of hot-dip galvanized steel sheets by either directly immersing in a solution containing silane and molybdate as additive (single-step process), or firstly immersing in a molybdate solution, then in a silane solution (two-step process). The chemical compositions and microstructures of the films were examined by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES) and reflection absorption infrared spectroscopy (RAIR). The corrosion resistances were investigated by electrochemical measurements and neutral salt spray (NSS) test. The results showed that the molybdate/silane composite film formed in the single-step process had a similar double-layer structure as that obtained in the two-step process. The inner layer was composed mainly of the elements O, Mo, Zn, and P, similar to the single molybdate film; whereas the outer layer was composed mainly of the elements C, O and Si, similar to the single silane film. Compared with the single molybdate or silane film, the corrosion current of the composite films was reduced and the impedance of the films was increased. Accordingly, the corrosion resistance of the composite films was remarkably enhanced to a level which was comparable to or even surpassing that of the conventional chromate passivation film.     

Synergistic corrosion protection for galvanized steel by phosphating and sodium silicate post-sealing

To improve the corrosion resistance of phosphate coatings, the phosphated hot-dip galvanized (HDG) sheets were post-sealed with sodium silicate (water glass) solutions. The morphology and chemical composition of the composite coatings was analyzed using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The effect of sodium silicate post-sealing treatment on the corrosion behaviors of phosphate coatings was investigated by neutral spray salt (NSS) tests and electrochemical measurements. The results show that after the silicate post-treatment the pores among zinc phosphate crystals are sealed with the films containing Si, P, O and Zn, leading to the formation of the continuous composite coatings on the surface of HDG steel. The corrosion resistance of the composite coatings depending on concentration of sodium silicate and post-sealing time is greatly improved by the silicate post-treatment. The optimum concentration of silicate and post-sealing time are 5 g/L and 10 min, respectively. Both the anodic and cathodic processes of zinc corrosion on the samples are suppressed conspicuously, and the synergistic protection effect of the single phosphate coatings and the single silicate films is evident. Moreover, the low frequency inductive loop in electrochemical impedance spectroscopy (EIS) is disappeared and the electrochemical impedance values are increased for more than one order of magnitude. The corrosion protection of the composite coatings is comparable to that provided by the chromic acid post-treatment.