缓蚀颜料复合型水性环氧富锌涂料的制备与应用

利用缓蚀型磷酸盐类颜料复配锌粉,制备了一种新型水性环氧富锌涂料.通过研究缓蚀型颜料的种类及用量,分散剂、流变助剂和附着力促进剂等助剂对富锌涂料相关性能的影响,对涂料配方进行优化.结果表明:选用BYK-2055作为分散剂,1.25％的气相二氧化硅A200和1％的膨润土828作为流变助剂,用9％防锈颜料三聚磷酸铝复配65％...     

国外金属铝、锌颜料防腐研究现状

从防腐机理、腐蚀评定办法与缓蚀剂种类等方面概括了国外金属铝、锌颜料的防腐研究现状，腐蚀评定办法主要包括析氢法、热重法、极化测试、SEM与XPS；缓蚀剂主要分为无机缓蚀剂与有机缓蚀剂两大类。     

有机添加剂对锌在碱液中的缓蚀作用研究

通过析氢实验、Tafel极化曲线和交流阻抗图研究了癸醇磷酸酯钾盐(A)、癸醇聚氧乙烯(3)醚磷酸酯钾盐(B)和癸醇聚氧乙烯(8)醚磷酸酯钾盐(C)三种缓蚀剂对锌在KOH溶液中的缓蚀作用，缓蚀剂C可使析氢量减至33．1％，缓蚀效率可达78．7％。缓蚀性能受缓蚀剂浓度和结构的影响。     

硝酸溶液中十二烷基苯磺酸钠对锌的缓蚀作用及吸附热力学研究

采用失重法研究了硝酸介质中烷基磺酸盐类阴离子表面活性剂对锌的缓蚀及吸附作用,考察了在不同温度的3%硝酸中,不同浓度的十二烷基苯磺酸钠对锌的缓蚀作用。实验结果表明,十二烷基苯磺酸钠能很好的抑制锌的腐蚀,当其含量达到一定浓度后,缓蚀作用基本保持不变,而其在锌表面上的吸附是产生缓蚀作用的重要原因。在浓度为0~300 mg/L时,十二烷基苯磺酸钠在锌表面的吸附规律服从Langmuir吸附等温式。用Sekine方法处理实验数据,从而获得了ΔH0、ΔS0和ΔG0等一系列相关的热力学参数。     

氨基磺酸溶液中肉桂醛对锌的缓蚀作用及吸附热力学探究

利用失重法研究了在不同浓度的氨基磺酸介质中不同浓度、温度的肉桂醛对锌的缓蚀和吸附作用。实验结果表叫,和5％的氨基磺酸介质中肉桂醛对锌何良好的缓蚀作用,在低浓度时随肉桂醛浓度增大缓蚀作用加强,但是当其含量达到一定浓度后,缓蚀作用基本保持不变。根据结构理论分析了肉桂醛在锌表面上的吸附是产生缓蚀作用的重要原因,且肉桂醛存锌表面的吸附规律服从Lmgmuir等温式。     

硝铵锌中锌的测定

在pH=10氨性溶液中,PAN与硝铵锌中的锌离子反应生成难溶于水的橙红色络合物。在PVA表面活性剂存在下。PAN-锌络合物成水溶性的络合物,可直接比色测定,它在水溶液中的最大吸收波长为525nm。锌离子浓度在O.0-0.8mg/L范围内符合朗伯-比耳定律。该方法操作简便,干扰少。精密度和准确度都较高。该方法应用于实际样品的测定,效果较满意。     

富锌涂料及其锌含量的测定

介绍了几种富锌涂料的特点及其锌含量的测定方法。     

紫竹竹叶提取物作为盐酸中锌的缓蚀剂的研究

用失重法研究了紫竹(Phyllostachys nigra Munro)竹叶提取物PMLE在0.01~0.05 mol/LHCl溶液中对锌的缓蚀作用。结果表明:PMLE对锌在0.01 mol/LHCl溶液中具有良好的缓蚀作用,且在锌表面的吸附符合Langmuir吸附等温式。缓蚀率随缓蚀剂浓度的增加而增大,但随温度和盐酸浓度的增加而减小。通过Van't Hoff方程和Mathur经验动力学公式分别求出了吸附焓ΔHads和腐蚀动力学参数(速率常数k,动力学常数B),并据此参数讨论了PMLE的缓蚀行为。     

930型荧光光度计测定微量锌的方法研究及应用

本实验建立了以８－羟基喹啉－５－磺酸为显色剂,以表面活性剂氯化十四烷基二甲基苄胺为增敏剂,以氯仿为萃取剂,仪器选用低价格的９３０型荧光光度计,利用Ｚｎ（Ⅱ）－ｈ２ＱＳ－Ｚｅｐｈ三元体系对微量锌的萃取荧光分析方法。     

碱性锌酸盐镀锌液中锌的测定

碱性锌酸盐镀锌液中锌的测定,过去大多采用在pH=l0的氨性缓冲溶液中,用氰化物将主要元素锌及铜、铁和铅等杂质络合掩蔽,然后加入甲醛解蔽,以EDTA标准溶液滴定镀液中的锌,但是由于这种方法使用了剧毒的氰化物.在分析过程中,又危害分析人员的健康.国内外广大分析化验人员对碱性锌酸盐镀锌液中锌的分析测定,作了许多有益的探讨,并寻求了许多种新的测定方法.但是,某些方法虽然分析测定准确,测定的步骤却比     

The effect of poly(vinyl caprolactone-co-vinyl pyridine) and poly(vinyl imidazol-co-vinyl pyridine) on the corrosion of steel in H<Subscript>3</Subscript>PO<Subscript>4</Subscript> media

The inhibiting effect of two organic copolymers namely poly(vinyl caprolactone-co-vinyl pyridine) (PVCVP) and poly(vinyl imidazol-co-vinyl pyridine) (PVIVP) on the corrosion of steel in phosphoric acid was investigated at various temperatures. The study was carried out by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurements. Inhibition efficiency (E %) increased with polymer concentration to attain 85% at 10⁻⁴ M for PVIVP. Adsorption of polymers on the steel surface in 2 M H₃PO₄ followed the Langmuir isotherm model. EIS measurements show that the dissolution of steel occurs under activation control. Polarisation curves indicate that the tested polymers functioned as cathodic inhibitors. E % values obtained from various methods used are in good agreement with each other. The temperature effect on the corrosion behaviour of steel in 2 M H₃PO₄ in the presence and absence of the inhibitor was studied in the temperature range 298–338 K. The adsorption free energy (ΔG ^o _ads) and the activation parameters (E _a, , ΔS ^o _a) for the steel dissolution reaction in the presence of polymer were determined.     

金属拔丝用中温磷化液的研制

研制了了一种使用方便,性能优良的金属拔丝用中温锌系磷化液,并对磷化膜的形成机理进行了探讨,根据实验结果分析讨论了游离酸度,总酸度等因素对磷化膜质量的影响。     

Understanding the inhibitory effect of sodium oleate on the corrosion of Al and Al–Cu alloys in 1.0 M H<Subscript>3</Subscript>PO<Subscript>4</Subscript> solution—Polarization studies

Polarization measurements were employed, as a first step towards studying the corrosion behaviour of Al and two Al–Cu alloys, namely Al–4.5%Cu, and Al–7.5%Cu alloys in deaerated stirred 1.0 M H₃PO₄ solution at 25 °C. Inhibition of Al and Al–Cu alloys corrosion in 1.0 M H₃PO₄ solution, using sodium oleate (SO) as an anionic surfactant inhibitor, was also studied. Polarization curves showed that SO acted as a mixed-type inhibitor to Al corrosion, while it acted mainly as a cathodic inhibitor to the acid corrosion of Al–4.5%Cu, and Al–7.5%Cu alloys. Inhibition is accomplished by inhibitor adsorption on the electrode surface without detectable changes in the chemistry of corrosion. The relationship between surfactant concentration, surfactant critical micellar concentration (CMC), and corrosion inhibition is also discussed based on the Langmuir isotherm assumption, commonly applied in corrosion inhibition evaluations. The protection efficiency increases with increase in surfactant concentration and %Cu in Al samples. Maximum protection efficiency of the surfactant is observed at concentrations around its CMC. The mechanism of adsorption is discussed based on the surface charge of the electrode surface.     

不锈钢在湿法磷酸中的应用

介绍湿法磷酸生产中杂质、操作条件、酸浓度、温度、搅拌、有饥物等对腐蚀的影响和材料选择的基本要素，并列出多种不锈钢的主要化学成份和几种工艺流程的材料选用表。     

物理化学中极化曲线的测定实验改革

极化曲线测定实验是物理化学实验中比较重要的一项实验,其目的在于帮助学生更好地掌握稳态恒电位法测定金属极化曲线的基本原理和测试方法,以及了解极化曲线的意义和应用,但在实际的实验教学中,由于种种因素,该实验的效果并不显著。基于此,通过对极化曲线实验具体内容的分析,指出了极化曲线测定实验改革的方法,以希冀给予广大大学物理化学教师一些帮助和建议,进而促进极化曲线测定实验教学效率与质量的提高。     

锌盐在不同缓蚀阻垢剂中的溶解性

对工业上常用的有机磷系缓蚀阻垢单剂对锌盐的溶解性进行测定,并对用单剂复配的复合缓蚀阻垢剂对锌盐溶解性进行比较。得出单剂ATMP对锌盐溶解性较好,用ATMP复配的产品其溶锌能力比ATMP差。HEDP对锌盐溶解性差,但用HEDP与其它药剂复配后溶锌能力增强。为以后研究缓蚀阻垢剂的复配提供依据。     

高锌烟灰中提取锌及富集铟工艺研究

本文研究了从高锌烟灰中提取锌及有价金属铟的富集,考察了在不同工艺参数对浸出的影响,得到优化的浸出条件。同时在回收铟等有价金属时,还注意到环保问题,有效地提高酸的使用率,减少污染。整个工艺过程基本不产生废渣、废液、和废气。试验表明：pH=5．2时,Zn的浸出率达81％,铟在终酸度为53．65g／1,浸出率达92％。     

Corrosion of zinc in simulated carbonated concrete pore solutions

The electrochemical behaviour of pure Zn and galvanized steel in solutions simulating the pore solution of carbonated concrete has been studied by means of potentiodynamic polarization tests and polarization resistance measurements. Pure Zn was chosen because it simulates well the behaviour of galvanized steel, yielding more reproducible results. The effect of different degrees of carbonation and the presence of different chloride contents in the simulated pore solutions was investigated. Results show that at a given pH (about 9.5) the corrosion susceptibility of Zn depends on anions concentration (carbonate and bicarbonate). The results obtained in simulated carbonated concrete pore solutions show that with low anion concentration Zn does not passivate while in presence of high levels of carbonate and bicarbonate the corrosion resistance is improved. Besides, the presence of chloride increases the corrosion susceptibility.     

Synergistic effect of tolutriazol and sodium carboxylates on zinc corrosion in atmospheric conditions

During the transport or the storage, galvanized steel products undergo the wet storage stain phenomenon, leading to the formation of unsightly and extensive white rust of zinc. In the context of development of temporary protection to replace mineral oils, the present study is focused on the combined action of sodium heptanoate (CH₃(CH₂)₅COONa, noted NaC₇) and 3-methyl benzotriazol (named tolutriazol, TTA) on zinc corrosion. Stationary and dynamic electrochemical measurements have shown that the association of NaC₇ and TTA provokes the formation of insoluble and hydrophobic passive layer, and lead to a positive synergy between the anodic and cathodic inhibiting actions of the two respective compounds. According to XPS and MEB analysis, the protective material is a layer containing zinc cation, heptanoate anion and TTA molecules, formed by a mechanism of precipitation on the zinc surface. In accordance with the coordination properties between Zn²⁺ and TTA determined by pH titration, the TTA molecules is trapped in a zinc soap, probably in a compound, Zn(TTA)₂(C₇)₂, which explains the efficiency of this formulation in the climatic chamber test.     

植物单宁酸及其复配物缓蚀阻垢协同效应的研究

研究了单独使用植物单宁酸的缓蚀阻垢性能以及将植物单宁酸与其他常用水处理药剂进行复配,通过评价这些复配药剂的缓蚀阻垢性能,研究这些复配药剂的协同效应.结果表明:单独使用植物单宁酸的缓蚀阻垢性能不佳,植物单宁酸复配物可以获得优良的缓蚀阻垢效果.