XM—606盐水介质缓蚀剂对钢铁的缓蚀作用

ＭＸ－６０６盐水介质缓蚀剂是由钼酸钠、醇胺磷酸酯、磷酸二氢锌和乌洛洛托品组成的。它对抑制钢铁在盐水中腐蚀特别有效,浓度为０．１５％时,缓蚀率高达９９．２４％。这种缓铡剂不仅高效,而且剂量小,成本低,原材料无毒。     

缓蚀剂结构对钢铁缓蚀效果的影响

本文主要研究碳原子数不同的脂肪酸二环己胺盐及十二烷胺盐在中性水及10％盐酸溶液中的缓蚀效果。研究结果表明,十个碳的二环已胺在中性水中具有最好的缓蚀效果。已酸、辛酸及癸酸十二烷胺等是盐酸溶液中钢铁的优良缓蚀剂。此外并对上述缓蚀剂结构对钢铁缓蚀效果的影响进行理论阐述。     

EC缓蚀剂对钢铁的缓蚀行为研究

用失重法、极化曲线法研究了EC缓蚀剂在H_2S和NaCl溶液中对20碳钢的缓蚀行为,分析了分子结构对缓蚀作用的影响及其在钢铁表面的吸附。结果表明,EC缓蚀剂具有良好的缓蚀效果。     

缓蚀剂缓蚀作用的研究方法

缓蚀剂防护技术在石油、化工、冶金等领域得到了广泛的应用。腐蚀研究方法对于指导缓蚀剂的合成、优化及应用具有十分重要的间谍。对电化学、光谱学等腐蚀研究的传统方法和近代分析测试技术进行综述,并简要介绍了其现状与应用情况。     

SDEDTC和BAA对钢的缓蚀协同效应研究

采用电子探针微观测试手段探讨了金属表面膜的特征，得到了丰富的表面膜微观信息；利用静态挂片、极化曲线和交流阻抗测量的结果，发现氨荒酸盐化合物二乙基二硫代氨基甲酸钠（Sodium Diethyl Dithiocarbamate，SDEDTC）和2-苯甲酰基-3-羟基-1-丙烯（2-Benzoylallyl Alcohol ，BAA）存在缓蚀协同效应.     

利用FFV预测缓蚀剂在不同体系中的协同效应

目的 研究一种分析缓蚀组分间协同效应的新方法。方法 使用Material Studio 7.0软件中的Amorphous Cell模块进行对象构建,在不同体系中利用Discover模块进行优化和运算,以水分子为探针进行FFV值测试,模拟计算得到FFV,再利用其变化率,来预测缓蚀组分间的协同效应,并通过传统方法验证该方法的正确性。结果 FFV模拟结果表明,在CO2体系中,MTIAS与AB2N具有协同效应,当二者按照摩尔比3∶2复配时的FFV最小,FFV的变化值D值最大,协同效应最好,缓蚀效率最高,而MTIAS与CPQA没有明显协同效应。在CO2/H2S体系中,MTIAS与CPQA按照摩尔比4∶1复配时的FFV最小,D值最大,协同效应最好,缓蚀效率最高;而当按照摩尔比1:4复配时,却出现了明显的拮抗效应,此时MTIAS与AB2N没有明显协同效应。失重法、极化曲线的测试结果与上述结果吻合。结论 通过缓蚀剂膜层的FFV预测缓蚀组分间的协同效应,是一种快速有效的研究方法。     

XM-606盐水介质缓蚀剂对钢铁的缓蚀作用

XM-606盐水介质缓蚀剂是由钼酸钠、醇胺磷酸酯、磷酸二氢锌和乌洛托品组成的.它对抑制钢铁在盐水中腐蚀特别有效,浓度为0.15%时,缓蚀率高达99.24%.这种缓蚀剂不仅高效,而且剂量小,成本低,原材料无毒.     

XM-404海水介质缓蚀剂对钢铁的缓蚀作用

XM-404海水介质缓蚀剂是由钼酸钠、醇胺磷酸酯和磷酸二氢锌组成的.它对抑制钢铁在海水中腐蚀特别有效,浓度为80×10~(-4)%时,缓蚀率高达99.73%.这种缓蚀剂不仅高效,而且剂量小、成本低、原材料无毒.     

有机缓蚀剂对电偶腐蚀的缓蚀效果

通过表面形貌观察和电化学分析研究了有机混合缓蚀剂苯并三氮唑(BTA)和苯甲酸钠在去离子水中对金属钆、La(FeSi)13合金电偶腐蚀的缓蚀效果。结果表明:在添加0.05mol/L BTA与0.05mol/L苯甲酸钠的去离子水中,当La(FeSi)13合金、金属钆与304不锈钢形成电偶对时,其耐蚀性比在去离子水中有大幅提升,La(FeSi)13/钆、304不锈钢/钆、304不锈钢/La(FeSi)13三种电偶对的缓蚀率分别达到了90.5%、93.5%和96.5%;苯并三氮唑和苯甲酸钠能够有效抑制以上金属间的电偶腐蚀。     

无机复合缓蚀剂对碳钢的缓蚀性能

采用失重法、动电位扫描极化和电化学阻抗等方法研究了复合缓蚀剂对碳钢在20%NaCl溶液中的缓蚀作用。结果表明,单独使用六偏磷酸钠的缓蚀率仅为74.3%。而六偏磷酸钠(SHMP)分别与苯甲酸钠、钨酸钠、磷酸钠和硅酸钠复配,其中六偏磷酸钠与硅酸钠复合的缓蚀效果最好。六偏磷酸钠与硅酸钠的最佳比为2:1,复合缓蚀剂浓度为6.0g/L,缓蚀率达97.2%。     

Inhibition of Mild Steel Corrosion Using l-Histidine and Synergistic Surfactants Additives

The corrosion inhibition behavior of nitrogen-containing amino acid l-Histidine (LHS) on mild steel in 0.1 M H₂SO₄ solution in the temperature range of 30-60 °C was studied by weight loss measurements, and potentiodynamic polarization measurements. The effect of the addition of very small concentration of surfactants, sodium dodecyl sulfate (SDS), and cetyltrimethyl ammonium bromide (CTAB), respectively on the corrosion inhibition behavior of LHS was also studied. The surface morphology of the corroded steel samples was evaluated by scanning electron microscopy (SEM) and atomic force microscopy (AFM). LHS significantly reduces the corrosion rates of mild steel, with the maximum inhibition efficiency (IE) being 71.09% at 30 °C in the presence of 500 ppm of LHS. The IE of LHS is synergistically increased in the presence of SDS and CTAB. The SEM and AFM photographs show a clearly different surface morphology in the presence of additives. LHS alone and in combination with surfactants obeys Langmuir adsorption isotherm from the fit of the experimental data of all concentration and temperature studied. The calculated thermodynamic parameters for adsorption reveal strong interaction between the inhibitors and the mild steel surface, and suggest physical adsorption. The results obtained by potentiodynamic polarization measurements are consistent with the results of the weight loss measurement. LHS acts more anodic than cathodic inhibitor.     

盐酸溶液中Tween-80和CTAB对Q235钢的缓蚀协同作用

目的 探究Tween-80（失水山梨醇单油酸酯聚氧乙烯醚）和CTAB（十六烷基三甲基溴化铵）共同存在于盐酸溶液中时,两者对钢材的缓蚀协同作用。方法 采用失重法、极化曲线、阻抗谱、协同参数、SEM图和AFM图,对钢材腐蚀的电化学特征、Tween-80和CTAB的协同作用效果以及钢材腐蚀后的表面形貌进行探究。结果 在各反应温度下,当不同浓度Tween-80与2?10?5 mol/L CTAB共同作用于1 mol/L盐酸溶液中时,腐蚀电流密度显著减小,电荷转移电阻显著增大。复配缓蚀剂属于混合型缓蚀剂,能够同时抑制阴极和阳极反应,其缓蚀效率随反应温度升高而下降。当反应温度为30、40、50 ℃时,复配缓蚀剂分别在Tween-80浓度为5?10?6、2?10?5、2?10?5 mol/L的条件下达到最佳缓蚀效果,最佳缓蚀效率分别为97.05%、94.00%和93.96%。SEM图和AFM图显示,钢材在含复配缓蚀剂的盐酸溶液中反应12 h后,表面平坦,平均粗糙度很小。结论 Tween-80与CTAB以一定浓度共同存在于盐酸溶液中时,两者之间具有很好的协同作用。复配缓蚀剂能够显著提高缓蚀效率,有效地抑制钢材的腐蚀。     

The Effect of Several Anions and Inhibitors Mixed with Propargyl Alcohol on Electrode Reactions and Corrosion of Steel in Sulfuric Acid

The effect of arsenate- and halide-ions, sulfur-containing compounds, and a nitrogen-containing inhibitor on the inhibition of the corrosion of steel 3 and electrode reactions on iron in sulfuric acid by propargyl alcohol (PA) is studied with the use of weighing and various potentiostatic polarization. None of the additives completely suppress the process of cathodic hydrogenation of PA. It is advisable to apply PA in small concentrations with the addition of rhodanide-ions and Captax.     

Study of Organic Derivatives of the VIa Group Elements as Steel Acid Corrosion Inhibitors

Effects of derivatives of (4-dimethylaminophenyl) disulfide, diselenide, and ditelluride, as well as bis(4-dimethylaminophenyl)thio- and bis(4-dimethylaminophenyl)selenodimethyl ether on an СТ3 steel free corrosion and on partial electrode processes in sulfuric and hydrochloric acid solutions are studied by gravimetric and voltammetric methods. It is shown that the protective action of the studied substances becomes more pronounced when passing from the initial compounds to their di-iodmethylates; in a sequence of similarly structured compounds, the protective action changes when passing from sulfur to selenium and tellurium derivatives. __________ Translated from Zashchita Metallov, Vol. 41, No. 5, 2005, pp. 473–478. Original Russian Text Copyright ? 2005 by Chernyad'ev, Shein, Nedugov.     

Corrosion Inhibition of Sodium Silicate and Piperazine and Their Synergistic Effect on Carbon Steel in Soft Water Media

Protection of Metals and Physical Chemistry of Surfaces - The aim of this study is first to investigate piperazine behavior as an inorganic corrosion inhibitor for a ST-14 steel and then to explore...     

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%.     

Synergistic Effect of Purpald with Tartaric Acid on the Corrosion Inhibition of Mild Steel: from Electrochemical to Theoretical Insights

The mutually corroborated electrochemical measurements and theoretical calculations were used to investigate the corrosion inhibition performances of purpald (4-amino-3-hydrazino-5-mercapto-1,2,4-triazole, AHMT) and its synergistic effect with tartaric acid (TA) on mild steel in 0.5 M H₂SO₄ solution. The experimental results show that the inhibition efficiency increases with the concentration of AHMT and increases further when TA exists. Density functional theory (DFT) calculations were performed to interpret the measured data and trends observed in the electrochemical studies. Furthermore, molecular dynamic simulation revealed a nearly flat configuration for molecules on metal surface with negative adsorption energies in a sequence agreed with experimental observation.

     

Applying Corrosion Inhibitors to Metal Surfaces in Electrostatic Field

A basically new method, not yet described in the world literature, for applying volatile corrosion inhibitors to metal surfaces in electrostatic field is suggested. The method is applicable in the corrosion protection of machinery for oil extraction and processing (gas–air zones in oil- and petroleum-storage tanks, separators, etc.), including its protection against atmospheric corrosion.