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动电位极化曲线     
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  potentiodynamic polarization curve
     The electrochemical corrosion behaviors of bulk nanostructured industrial pure iron (BNIPI) and coarse grain industrial pure iron rod (CGIPIR) in 0.01 mol/L H2SO4+0.25mol/LNa2SO4 solution were investigated by potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS) at ambient temperature.
     通过动电位极化曲线,电化学阻抗谱(EIS)实验,研究了块体纳米工业纯铁(BNIPI)和粗晶工业纯铁棒(CGIPIR)在室温0.05mol/lH2SO4+0.25mol/lNa2SO4溶液中的腐蚀行为.
     The electrochemical corrosion behaviors of bulk nanostructured industrial pure iron (BNIPI) and coarse grain industrial pure iron rod (CGIPIR) in 0. 01 mol/L H2SO4+0. 25 mol/L Na2SO4 solution were investigated by measurements of potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS) at ambient temperature.
     通过动电位极化曲线、电化学阻抗谱(EIS)试验,研究了块体纳米工业纯铁(BNIPI)和粗晶工业纯铁棒(CGIPIR)在室温0.05mol/LH2SO4+0.25mol/LNa2SO4溶液中的腐蚀行为,用SEM对极化测试后的试样形貌进行了观察。
短句来源
     The electrochemical corrosion behaviors of bulk nanostructured industrial pure iron(BNIPI) and coarse grain industrial pure iron rod(CGPIR) in 1 mol. L~(-1) hydrochloric acid solution were investigated by potentiodynamic polarization curve,static weight loss experiment(gravimetric test) and electrochemical impedance spectroscopy(EIS) at ambient temperature.
     通过静态失重试验,动电位极化曲线,电化学阻抗谱(EIS)实验,研究了块体纳米工业纯铁(BNIPI)和粗晶工业纯铁棒(CGPIR)在室温1mol/l盐酸溶液中的腐蚀行为.
短句来源
     A series imidazoline derivatives, which have different molecular structure and function group, were synthesized and investigated respectively for the inhibition characteristics, the effect of temperature on the inhibition efficiency by potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS) inH2S solutions. The results show that imidazoline derivatives have a good inhibition to the mild steel in H2S solutions, that is strongly dependent on the chemical interaction between imidazoline molecule and the surface of metals.
     合成了14种具有不同结构和官能团的咪唑啉衍生物,利用交流阻抗和动电位极化曲线,对其在H2S溶液中的缓蚀作用特征和性能,以及温度的变化对其缓蚀性能的影响进行了研究,结果表明咪唑啉化合物对H2S溶液中低碳钢的腐蚀具有良好的保护性能,这主要依赖于化合物分子与金属表面存在较强的化学作用;
短句来源
     Potentiodynamic polarization curve measurement showed that corrosion potential for both films are all close to-0.4V? (SCE),the passive region for electroless nickel film from nickel sulphate bath is more considerable,and this film presented better corrosion resistance.
     动电位极化曲线测试结果表明,两种镀层自腐蚀电位均接近-0.4 V(SCE),硫酸镍体系化学镀镍层钝化区间更为明显,耐蚀性能更为优异.
短句来源
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  potentiodynamic polarization curves
     Potentiodynamic polarization curves show that the corrosion resistance of the amorphous Fe70Cr10P13C7 is much higher than that of the 1Cr18Ni9Ti stainless steel and amorphous Ni-Nb alloy with addition of Cr.
     该非晶层动电位极化曲线表明,非晶态Fe70Cr10P13C7的耐腐蚀性高于1Cr18Ni9Ti不锈钢和加Cr的Ni-Nb非晶合金。
短句来源
     The potentiodynamic polarization curves in 3.5%NaCl solution indicate that the Ni-P-ZrO_2 composite coating could provide adequate protection to magnesium alloy substrate.
     Ni-P-ZrO2复合镀层与AZ91D合金基体在3.5%NaCl溶液中的动电位极化曲线对比表明,该复合镀层对镁合金可以起到明显的保护作用;
短句来源
     Nitrate ion has been examined as a corrosion inhibitor for aluminium in 1.5 mol/L hydrochloric acid solution by weight-loss and potentiodynamic polarization curves.
     用失重法和动电位极化曲线方法研究了硝酸根离子对工业纯铝在1.5 mol/L HCl溶液中的缓蚀作用和机理,讨论了其在铝表面的吸附。
短句来源
     The corro sion resistance of the amorphous layer was improved by adding Cr. Potentiodynamic polarization curves show that Ni_(50)Nb_(40)Cr_(10) is much more corrosion-resistant than stainless steel 18-8.
     所得动电位极化曲线表明,非晶态Ni_(60)Nb_(40)的耐腐蚀性远优于晶态的Ni_(60)Nb_(40),在Ni-Nb中加Cr所得非晶涂层其耐腐蚀性有很大提高,且优于18-8不锈钢。
短句来源
     According to potentiodynamic polarization curves measurement, the treated samples exhibit an improved corrosion resistance in 5wt% NaCl solution compared with the initial samples.
     通过动电位极化曲线测定 ,处理样品在 5 %NaCl溶液中的抗蚀性能有显著改善。
短句来源
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  electrokinetic potential polarization curve
     The pretreatment for electroless nickel plating and technology of electroless nickel plating of AZ31 magnesium alloy, which has good plastic deformation ability, has been studied; The corrosion resistance, initial deposited and corrosion failure of coating have also been studied systematically by using metallographic observation, SEM observation, EDS analysis, XRD analysis, salt spray test, electrokinetic potential polarization curve research techniques.
     本文针对具有良好塑性变形能力的AZ31镁合金,结合金相观察,SEM观察,EDS分析、XRD分析,盐雾试验,动电位极化曲线测量等手段,系统地对前处理工艺、化学镀镍工艺、镀液的周期使用、镀层耐蚀性能、初期沉积机理和腐蚀失效机理进行了研究。
短句来源
     Electrokinetic potential polarization curve show that the corrosion potential ascend 1185mV and the corrosion current descend three orders after plating Ni-P coating on AZ31 magnesium alloy.
     电化学动电位极化曲线表明,AZ31镁合金表面化学镀镍后,自腐蚀电位相对基体镁合金正移1185mV,自腐蚀电流下降3个数量级;
短句来源
  potentialdynamic polarization curves
     Corrosion resistance of the obtained ceramic coatings was studied by the measurement of anodic polarization curves, cyclic potentialdynamic polarization curves, pit corrosion potential and corrosion tests in iron trichloride and 5 percent sulfuric acid.
     利用阳极极化曲线的、循环动电位极化曲线、点蚀电位的测量以及三氯化铁和5% 硫酸介质中的腐蚀试验研究了所得陶瓷涂层的耐蚀性。
短句来源

 

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      potentiodynamic polarization curve
    The influence of the substrate and of the crack pattern of the electrodeposited chromium layer on the passivation and the reactivation behaviour has been studied by means of potentiodynamic polarization curve measurements and cyclic voltammetry.
          
      potentiodynamic polarization curves
    To determine activation energy of corrosion process, potentiodynamic polarization curves were also obtained in a temperature range from 298 to 328 K.
          
    In 0.5?M NaCl, additionally, the effect of solution pH (3, 7 and 10) and concentration (0.1, 0.5 and 1.0?M) was studied using techniques such as potentiodynamic polarization curves, linear polarization resistance and electrochemical noise in current.
          
    Techniques included potentiodynamic polarization curves and linear polarization resistance curves.
          
    The results of the electrochemical analysis including polarization resistance and potentiodynamic polarization curves showed that a magnetic field of 0.1?T could significantly improve the corrosion resistance of the composite.
          
    Techniques included potentiodynamic polarization curves, linear polarization resistance, and change of the free corrosion potential with time and electrochemical noise in current.
          
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    This paper describes some consequences of selecting inhibitors in sulphuric acid solutions by using the methods of linear polarization technique and. pote-ntiodynamic polarization. It is much easier and faster to select the inhibitors and evaluate their inhibition efficiencies by the above electrochemical methods. It is also more convenient to study the effects of different corrosion factors. By making use of above methods some better efficient inhibitors have been selected in the sulphuric acid solutions.

    本文叙述采用线性极化技术和动电位极化曲线法在硫酸介质中筛选缓蚀剂的一些结果。上述电化学方法能较快地筛选缓蚀剂和评价缓蚀剂的缓蚀效率,对于探讨各种腐蚀因素的影响是较方便的。使用上述方法筛选出一些在硫酸介质中有较佳效果的缓蚀剂。

    The corrosion resistance of Fe Cr8P13 B5 and FeCr8 P13 C7 alloys in different states have been investigated in the media containing chlorine ions by electrochemical measurement and total immersion test. Experimental results showed that: (1)The amorphotis Fe Cr8 P13 B5 and Fe Cr8 P13 C7 alloys have excellent corrosion resistance. The polarization curves of both amorphous corrosion resistant alloys are much similar measured in 3.5% NaCl at 30℃ by potentio-kinetic method. No breakdown potential(E_b) was observed...

    The corrosion resistance of Fe Cr8P13 B5 and FeCr8 P13 C7 alloys in different states have been investigated in the media containing chlorine ions by electrochemical measurement and total immersion test. Experimental results showed that: (1)The amorphotis Fe Cr8 P13 B5 and Fe Cr8 P13 C7 alloys have excellent corrosion resistance. The polarization curves of both amorphous corrosion resistant alloys are much similar measured in 3.5% NaCl at 30℃ by potentio-kinetic method. No breakdown potential(E_b) was observed within the measured region from-1.0 to+1.5 volts(SCE)and their anodic current densities maintain low level,less than 10μA/cm~2;The corrosion rates of both amorphous alloys are lower than 10~(-3)—10~(-4)mm/y in all immersion testing environments such as 3.5%0 NaCl at 60℃, 0.5—2.5N HCl at 30℃, 10% FeCl_3·6H_2O at 40 and 60℃ and 1M H_2S_O4+0.5MNaCl at 30℃. (2) After vacuum annealing treatment at 500℃ for 1 hour, the corrosion resistance of Fe Cr8 P13 C7 alloy dropped abruptly, while that of Fe Cr8 P13 B5 alloy remained as good as in the amorphous state. Electrochemical measurements and immersion test results agree very well.

    本文以电化学方法(动电位极化曲线测量)和全浸法考察了不同状态(无定形态、无定形合金退火态以及晶态)FeCr8P13B5和FeCr8P13C7合金在氯离子介质中的耐蚀性能,结果表明(1)无定形FeCr8 P13 B5和FeCr8P13C7合金都具有优异的耐蚀性能。它们的动电位极化曲线十分相似,当极代电压为+1.5伏(SCE)以下时。试样不出现破裂电位Eb,钝态电流维持在10微安/厘米~2以下;这两种无定形耐蚀合金在30℃的0.5N-2.5NHCl、40和60℃的10%,FeCl_3、6H_2O、60℃的3.5%NaCl以及30℃的1MH_2SO_4+0.5MNaCl中全浸168小时其腐蚀速率为10~(-3)-10~(-4)毫米/年。(2)无定形FeCr8P1385和FeCr8P13C7合金经500℃1小时真空退火(晶化)处理后,后者的耐蚀性能急剧恶化,而前者仍保持无定形状态的优异耐腐蚀性能。电化学测量与全浸试验所得的结果是一致的。

    The influence of concentrations of KOH and Zn(OH)_4~(2-) and that of temperature on he passivation of zino eleotrode were investigated with the galvanostatic charging method and he linear potential sweep method.For galvanostatic charging measurement, we devised an lectrode mounted in a shielding tube with working surface in upward direction to control the onvection of the electrolyte solution. The i-τ_p~(-1/2) relation was in accordance with the ollowing diffusion equation:(i-i_1)τ_p~(1/2) =1/2nF (C_Z~S - C_Z~0)...

    The influence of concentrations of KOH and Zn(OH)_4~(2-) and that of temperature on he passivation of zino eleotrode were investigated with the galvanostatic charging method and he linear potential sweep method.For galvanostatic charging measurement, we devised an lectrode mounted in a shielding tube with working surface in upward direction to control the onvection of the electrolyte solution. The i-τ_p~(-1/2) relation was in accordance with the ollowing diffusion equation:(i-i_1)τ_p~(1/2) =1/2nF (C_Z~S - C_Z~0) (Dπ)~(1/2) = K where τ_p is the ime of passivation, while C_Z~S and C_Z~0 are respectively the concentration of zincate ions at the lectrode surface and in the bulk of the solution. Each curve was composed of two straight lines with ifferent slopes. At lower current densities, i_1= 0, with the straight lines passing through the origin of the oordinate. At higher current densities, i_1≠0.The curves of linear potential sweep showed that the elation between the passivation potential φ_p and a_(OH)-is:φ_γ=constant-(RT)/F In α_(OH)~- hus uggesting that the rate determining step of zine passivation in alkalino solution is the chemical dissolution f inc hydroxide formed on tho electrode surface.In practically complete absence of convection and at lower urrent densities, the results of our investigation indicated that the passivation of zinc is controlled by the iffusion of Zn(OH)_4~(2-) ions, and the anodio passivating film is formed by the precipitation of zinc xide r hydroxide from the super-saturatod zincate solutions on the electrode. At higher current densities, anodic assivating film can also be formed on the electrode surface through electrochemical reactions, apart from he diffusioncontrolled precipitation mechanism.

    利用恒电流充电曲线法和动电位极化曲线法研究了KOH和Zn(OH)_4~(2-)浓度、温度等因素对锌电极惰化的影响.对于充电曲线的测取,设计了一个电极表面向上并加套管的装置,借以控制电解液的对流.所得的的关系,符合如下的扩散方程式:几组曲线均由斜率不同的两条直线组成,在低电流密度范围内,i=0,直线通过坐标原点;在高电流密度下,i_1≠0. 动电位极化曲线的结果表明,惰化电位(?)p与ln a_(oH-)符合如下的线性关系:由此进一步验证了锌氧化物的化学溶解过程是惰化的控制步骤. 实验结果表明,在对流几乎不存在和低电流密度下,惰化受Zn(OH)_4~(2-)扩散所控制,由过饱和的Zn(OH)_4~(2-)溶液中析出成相膜而引起惰化.在高电流密度下,除上述因素外,还可由电化学反应直接形成表面惰化层.

     
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