严川伟
,
林海潮
,
曹楚南
腐蚀学报（英文）
用光电子能谱(XPS)、红外光谱(IR)和扫描隧道显 微镜(STM)，对Cu在含NaCl的2-琉基苯并唑(MBO)溶液中处理后，其表面所形成的缓蚀膜进 行了研究.缓蚀膜的Cu2p\-\{3／2\}结合能值为932.3 eV，在Cu2p\-\{3/2\}和Cu2p\-\{1／2
\}之间没有“卫星峰”存在，且俄歇峰CuLMM的结合能为337.6 eV，表现了典型的一价Cu化 合物的特征.该缓蚀膜的红外光谱与MBO的一价Cu的合成化合物的红外谱图相一致.在形成缓 蚀膜前后，N1s和S2p的结合能变化显著，表明MBO分子可能通过S和N原于与一价铜离子键合 的.原位的STM表明，Cl\+-的存在可使MBO在Cu表面形成致密的三维膜.对MBO缓蚀膜的形成机 理进行了分析，解释了在MBO缓蚀膜形成过程中Cu腐蚀电位的变化.
关键词:
Cu
,
corrosion
,
2-Mercaptobenzoxazole(MBO)
,
Inhibition
杨帆
,
黎烈武
,
童东革
,
黄林艳
,
芦会杰
,
李倩倩
,
黄鑫辰
,
赵彦辉
,
李宾克
环境化学
doi:10.7524/j.issn.0254-6108.2015.08.2015013002
以市售的CaO为阻滞剂,分别添加MgO、CeO2、BaO、γ-Al2O3金属氧化物形成钙基复合氧化物,通过探究它们对前驱体五氯酚(PCP)生成PCDD/Fs反应的阻滞作用,讨论了MgO、CeO2、BaO、γ-Al2O3金属氧化物对CaO阻滞作用的影响.结果表明,在280℃下加热2h,钙基复合氧化物对PCP生成PCDD/Fs的阻滞活性都很高.在PCDD/Fs的生成总量上,CeO2、BaO、γ-Al2O3金属氧化物对CaO的阻滞效果起到促进作用;但在I-TEQ方面,仅BaO对CaO的阻滞效果有促进作用.CaO与BaO钙基复合氧化物对PCP生成PCDD/Fs的阻滞效率达到99.98％,总毒性当量阻滞效率TSE1-TEQ达到99.62％.钙基复合氧化物可能的阻滞机理是CaO、MgO、CeO2、BaO、γ-Al2O3均具有一定的碱性,能与酚类前驱体发生中和反应,阻滞了Ullman反应的发生,进而减少了PCDD/Fs的生成.
关键词:
PCP
,
PCDD/Fs
,
阻滞
,
钙基复合氧化物
P.Manivel
,
G.Venkatachari
材料科学技术（英文）
Poly p-aminobenzoic acid has been synthesized by chemical oxidation method. The inhibitive effect of poly p-aminobenzoic acid on iron in 1 mol/L HCl solution was investigated by polarization and electrochemical impedance spectroscopy and compared with that of monomer p-aminobenzoic acid. The effectiveness of poly p-aminobenzoic acid is very high in comparison with that of monomer. The results show that both cathodic and anodic processes were suppressed by p-aminobenzoic acid and poly p-aminobenzoic acid of iron dissolution in 1 mol/L HCl by their adsorption on the iron surface. The inhibition efficiency of both p-aminobenzoic acid and poly p-aminobenzoic acid were found to increase with the inhibitor concentrations. Ultraviolet (UV) reflectance studies of the iron surface after exposure to inhibitor acid show that poly p-aminobenzoic acid is strongly adsorbed on iron surface.
关键词:
p-aminobenzoic acid
,
null
,
null
,
null
,
null
S.M.Rashwan
,
A.Emam
,
S.M.Abd El-Wahab
,
M.M.Mohamed
材料科学技术（英文）
Anodic dissolution behaviour of Ni in mono-, di- and trichloroacetic acids has been investigated by measuring current densities of Ni electrode (versus SCE) at different potentials. Effects of acid concentration, pH, scan rate and additive inhibitor on the potential were studied and they revealed that there is a considerable shift of potential. Potentiodynamic polarization measurements show that the corrosion rate of Ni in chloroacetic acid solutions increases by increasing the previous factors. However, by adding inhibitor, it decreases.
关键词:
Corrosion
,
null
,
null
,
null
