您的位置: 专家智库 > >

国家自然科学基金(51210001)

作品数:10 被引量:6H指数:1
相关作者:左禹唐聿明周勇石慧英刘旭霞更多>>
相关机构:北京化工大学武汉工程大学更多>>
发文基金:国家自然科学基金高等学校学科创新引智计划更多>>
相关领域:金属学及工艺建筑科学一般工业技术更多>>

文献类型

  • 10篇中文期刊文章

领域

  • 7篇金属学及工艺
  • 3篇建筑科学
  • 1篇一般工业技术

主题

  • 4篇孔蚀
  • 3篇碳钢
  • 3篇小孔腐蚀
  • 2篇钝化
  • 2篇钝化膜
  • 2篇亚稳态
  • 2篇亚稳态孔蚀
  • 2篇缓蚀
  • 2篇CONCRE...
  • 2篇CORROS...
  • 1篇形核
  • 1篇乙醇胺
  • 1篇三乙醇胺
  • 1篇酸根
  • 1篇钼酸钠
  • 1篇钨酸
  • 1篇钨酸根
  • 1篇金属
  • 1篇金属材料
  • 1篇孔蚀行为

机构

  • 6篇北京化工大学
  • 1篇武汉工程大学

作者

  • 6篇左禹
  • 3篇唐聿明
  • 2篇周勇
  • 1篇赵旭辉
  • 1篇闫福安
  • 1篇石慧英
  • 1篇林冰
  • 1篇王怡珊
  • 1篇王佳妮
  • 1篇刘旭霞

传媒

  • 4篇腐蚀科学与防...
  • 4篇Journa...
  • 2篇中国腐蚀与防...

年份

  • 1篇2018
  • 2篇2017
  • 3篇2016
  • 3篇2015
  • 1篇2014
10 条 记 录,以下是 1-10
排序方式:
缓蚀性组分对金属小孔腐蚀的缓蚀作用与机制被引量:1
2017年
综述了近年来国内外若干缓蚀性物质对金属材料小孔腐蚀缓蚀效果和机制的研究进展,涉及到的缓蚀性物质主要包括无机阴离子、有机分子/离子以及稀土元素。到目前,针对无机阴离子对小孔腐蚀缓蚀效果和机制的研究相对较多,而针对稀土元素的则相对较少。本文通过综合介绍,以期为开发可同时抑制金属均匀腐蚀和小孔腐蚀的新型复合缓蚀剂提供支持和帮助,并指明进一步的研究方向。
周勇左禹闫福安
关键词:缓蚀剂金属材料小孔腐蚀
Correlation Between Microhardness and Microstructure of Anodic Film on 2024 Aluminum Alloy
2015年
The correlation between the microhardness and microstructure features of anodic films on 2024 aluminum alloy formed in the mixed sulfuric acid/oxalic acid electrolyte was studied using micro-hardness tester and scanning electron microscope (SEIVI). The results show that the microhardness of the anodic film is influenced by the mierostructure of the anodic film such as the film porosity, and the order and continuity of the hexagon columnar ceils. The film microhardness increases as the porosity of the anodic film decreases and the order and continuity of the film ceils increase. With the same current density, as the anodic film thickens with anodizing time, the film microhardness increases because the film porosity decreases and the order and continuity of the cells are also improved. Under the condition of the same anodizing time, as the current density increases, the film microhardness decreases due to the higher film porosity and the poorer order and continuity of the film ceils. The film porosity increases because the increased current density can accelerate the oxidation reaction, strengthen the filed-assisted dissolution and the heating effect in the anodic film, resulting in decreased film order and continuity.
张培ZUO Yu赵旭辉TANG YumingZHANG Xiaofeng
关键词:ANODIZINGMICROHARDNESSPOROSITYMICROSTRUCTURE
碳钢在碱性溶液中的孔蚀电位与HCO_3^-/Cl^-比值关系的研究被引量:1
2016年
研究了Na HCO3+Na Cl碱性溶液中,较宽Cl-浓度(0.001~0.3 mol/L)范围内Cl-浓度及HCO_3^-和Cl-的浓度比值([HCO_3^-]/[Cl-])对Q235碳钢小孔腐蚀电位的影响。结果表明,Cl-浓度较大(>0.02 mol/L)时,碳钢的稳定孔蚀电位Eb和亚稳态孔蚀电位Em都与[HCO_3^-]/[Cl-]符合很好的线性关系,[HCO_3^-]/[Cl-]升高Eb和Em线性增大;当Cl-浓度较小(<0.02 mol/L)时,Eb和Em与[HCO_3^-]/[Cl-]之间不存在良好的线性关系,该条件下碳钢表面在发生稳定孔蚀前观察不到微米级的亚稳态小孔。
林冰王怡珊王佳妮左禹唐聿明
关键词:碳钢亚稳态孔蚀
Influence of the C-S-H Amount on [Cl^-]/[OH^-]Ratio of Simulated Concrete SPS and the Corrosion Susceptibility of Steel
2017年
Two kinds of simulated concrete pore solutions(SPSs) were treated with different amounts of synthetic calcium silicate hydrate(C-S-H). The variation of the [Cl^-]/[OH^-] ratio in SPS was measured and the corrosion susceptibility of carbon steel in the SPS was investigated with potentiodynamic polarization, EIS and weight lose tests. The experimental results showed that for the SPS at p H 12.5, as the amount of C-S-H increases, the [Cl^-]/[OH^-] ratio increases thereby causing an increase in the corrosion susceptibility of the steel. While for the SPS at p H 9.7, with increasing C-S-H amount, the drop amplitudes of both [Cl^-]/[OH^-] ratio and steel corrosion rate first decrease and then increase, and a 3% C-S-H addition shows the best inhibition effect. XPS results demonstrate that after C-S-H treating in p H 12.5 SPS the [Fe^(3+)]/[Fe^(2+)] ratio in the film on steel surface is reduced while in p H 9.7 SPS the [Fe^(3+)]/[Fe^(2+)] ratio is increased. The different effects of the C-S-H amount on the two SPSs and the steel corrosion behavior result from the influences of C-S-H on the SPS p H, which is related to the composition of the SPS.
唐聿明DUN YuchaoMIAO YongfaZHAO XuhuiZUO Yu
钨酸根离子对304不锈钢亚稳态与稳态孔蚀形核与生长的影响被引量:2
2018年
利用动电位回扫的方法研究了钨酸根离子(WO_4^(2-))对304不锈钢亚稳态孔蚀及稳定孔蚀的形核与生长阶段的影响。随着WO_4^(2-)浓度的增大,304不锈钢亚稳态孔蚀电位Em和稳定孔蚀电位Eb值均升高,即WO_4^(2-)浓度的增大,抑制了亚稳态孔蚀和稳定孔蚀的形核。WO_4^(2-)浓度增加导致亚稳态孔蚀的平均生长速度和电流峰值降低,从而降低了亚稳态孔蚀转化为稳定孔蚀的可能性,抑制了稳定孔蚀形核。WO_4^(2-)增加导致孔蚀回扫过程中的最大电流密度增大,再钝化电位Ep降低,即导致生长的稳定蚀孔更难于再钝化,其原因可能是钨酸盐膜在小孔孔口的沉淀会促进蚀孔生长的稳定性。
石慧英左禹
关键词:不锈钢亚稳态孔蚀形核
MoO_4^(2-)和NO_2^-对碳钢小孔腐蚀的协同抑制作用
2015年
采用极化曲线、电化学阻抗谱(EIS)、莫特-肖脱基曲线和X射线光电子能谱(XPS)研究了MoO42-和NO2-对碳钢小孔腐蚀的协同抑制作用。结果表明,MoO42-和NO2-联合应用使碳钢的亚稳态孔蚀电位(Em)和孔蚀击穿电位(Eb)发生明显正移,并且显著提高了两者的差值,对抑制亚稳态小孔形核以及亚稳态小孔向稳态小孔转变的效果明显;MoO42-和NO2-联合应用可以在碳钢表面形成一层Fe2O3+Fe2(MoO4)3复合钝化膜,这层复合钝化膜的阻抗较大、缺陷较少,对碳钢的保护作用明显加强。
周勇左禹
关键词:碳钢小孔腐蚀钝化膜
The Adsorbing Effect of Calcined Layered Double Hydroxide for Chloride Ions in Simulated Concrete Pore Solutions被引量:1
2014年
The adsorbing effect of calcined layered double hydroxide (CLDH) for chloride ions in simulated concrete pore (SCP) solutions was investigated with the potentiodynamic polarization method, impedance measurement, ion selective electrode analysis and XRD. CLDH could effectively adsorb Cl^- and increase pH value in SCP solutions containing NaCl. The chloride to hydroxyl ions ratio ([C1^-]/[OH^-]) of the solution greatly decreased by CLDH treatment. In CLDH treated SCP solution with CI-, the pitting potential of carbon steel notably increased, and the surface impedance was much higher, indicating strengthened passivation. The process of CLDH adsorbing chloride ions from SCP solutions was accompanied with the reconstruction of the layered structure.
唐聿明ZHAO XuhuiNIU Le左禹
关键词:CORROSIONADSORPTIONCHLORIDE
钼酸钠和三乙醇胺对Q235碳钢小孔腐蚀的抑制作用被引量:1
2016年
通过动电位扫描,微区电位扫描,电化学阻抗谱及XPS等技术,考察了Na_2MoO_4和三乙醇胺(TEA)复配缓蚀剂对Q235碳钢孔蚀的抑制作用。结果表明:Q235碳钢在0.02 mol/L NaCl+0.1 mol/L NaHCO_3溶液中,适量的Na_2MoO_4与TEA复配对其孔蚀的抑制作用要优于单独使用Na_2MoO_4对孔蚀的抑制效果。在外加恒电位为0.3 V时,在实验溶液中碳钢表面有活性点被激活,Na_2MoO_4+TEA复配缓蚀剂能够明显抑制表面活性点的生成,并且能使形成的活性点的电位峰值迅速降低,抑制其向腐蚀小孔的转化。在加有Na_2MoO_4+TEA复配缓蚀剂的实验溶液中形成的缓蚀膜主要成分为Fe_2(MoO_4)_3,Fe_2O_3和TEA,三乙醇胺的吸附可以改善钼酸盐缓蚀膜的致密性,进一步提高缓蚀性能。
刘旭霞左禹唐聿明
关键词:钼酸钠三乙醇胺碳钢孔蚀缓蚀
应变作用下Q235碳钢在NaHCO_3+NaCl溶液中的孔蚀行为
2016年
用动电位极化、EIS和XPS等方法研究了应变作用下Q235碳钢在Na HCO3+Na Cl溶液中的孔蚀行为。结果表明:在0.2 mol·L-1Na HCO3+0.01 mol·L-1Na Cl溶液中,与无应变试样相比,8%的应变导致Q235碳钢的孔蚀电位Eb升高;随溶液Cl-浓度升高,应变试样的Eb逐渐降低,当Cl-浓度增大到0.1 mol·L-1时,应变试样的Eb值降低到与无应变试样相同的水平。另一方面,应变导致Q235钢钝化膜中Fe3+/Fe2+比值减小,膜阻抗降低,电荷转移电阻变小,钝化膜的稳定性有所降低。在实验条件下应变导致Eb升高的现象归因于溶液中HCO3-的存在,应变促进钢表面的阳极溶解,进而促进了HCO3-在表面的优先吸附,一定程度上抑制了Cl-促进孔蚀的作用。随溶液中HCO3-/Cl-的比值降低,应变导致的Eb值变化逐渐减小直至消失。
李阳恒左禹唐聿明赵旭辉
关键词:Q235钢孔蚀钝化膜
Tensile Strength and Oxide Analysis of Carbon Steel in Concrete Exposed in Atmospheric Environment for 53 Years
2015年
The tensile strength of a corroded rebar in a 53-year-old concrete structure was studied. The microstructure of the metallic substrate, the fracture surface, and the corrosion product layers were investigated. Metallographic observation results showed that the carbon steel was constituted of ferrite and some pearlite. The tensile test results indicated that the corroded rebar presented low strength and elongation. In addition, the fracture surface of the rebar in the tensile test displayed dimple fracture behavior. The Raman spectroscopy results indicated that corrosion products at the general corrosion zone were obviously different from those at the localized corrosion zone. The rust layer at the general corrosion zone was composed of goethite (α-FeOOH), magnetite (Fe304), and hematite (α-Fe203), while that of the pitting zone was made of feroxyhyte (δ-FeOOH), goethite (α-FeOOH), and hematite (α-Fe203). However, the general tendencies that the corrosion products were constituted of a mix of oxides and hydroxides, the oxides mainly existed in the internal part and the hydroxides more presented in the external layer were observed.
冯兴国LU XiangyuZUO Yu陈达SU Xiaodong
关键词:CONCRETEMICRO-RAMAN
共1页<1>
聚类工具0