resistance n. 1.抵抗,反抗,抗拒,抵御;敵對,抵抗力,反抗力,阻力,【生物學】抗病性。 2.【電學】電阻;阻抗;電阻器。 electric resistance 電阻。 abrasive resistance 耐磨力[度]。 dead resistance 吸收[消耗,鎮(zhèn)流]電阻。 passive resistance 無源電阻;消極抵抗。 a piece of resistance 主要品,壓軸,出類拔萃的東西;主菜,壓桌菜(=pièce de résistance)。 make some [no] resistance 進行[不]抵抗。 offer [put up] resistance to [against] 抵抗。 resistance welding 電阻焊接,電焊。 take the line of least resistance 采取阻力最小的路線;采取最省力的方法。
Measurement methods of polarization resistance of copper alloy tubes for condenser 冷凝器銅合金管抗極化特性的測量方法
Standard test method for conducting potentiodynamic polarization resistance measurements 動電勢極化電阻測量的標準試驗方法
Based on practical application conditions , half - cell potential method , concrete resistance measurement , linear polarization resistance method and etc . 3 根據(jù)現(xiàn)場的實際應用情況,最常用的方法有半電池電位法、混凝土電阻率檢測法、直流線性極化電阻法、交流阻抗法以及地質雷達法等。
The results show that the data measured in laboratory have the same tendence with those measured in thermal power plant and the annual corrosion rate and polarization resistance and the anticorrosion performance of brass tubes can be evaluated effectively with ac impedance 結果表明,實驗室數(shù)據(jù)與現(xiàn)場測試數(shù)據(jù)基本吻合,交流阻抗法可以提供凝汽器黃銅管在循環(huán)冷卻水系統(tǒng)中的年腐蝕速率和極化電阻,幫助現(xiàn)場工作人員及時了解凝汽器黃銅管的腐蝕狀況。
In acid copper sulphate solution , the nc copper has a more negative corrosion potential which is decreasing with reducing the grain size and diffusion impedance was only found in the as - prepared and as - annealed at 180 ? nc copper due to the diffusion within the pores and channels on the surface . both the tafel plots and eis study demonstrated that the nc copper exhibits a higher corrosion current and lower polarization resistance than its mc couterpart 在酸性硫酸銅溶液中,納米晶銅的腐蝕電位比微米晶銅要負,并且隨著晶粒尺寸的減小而降低。 eis研究表明,未退火的和180退火的納米樣品中發(fā)現(xiàn)了擴散阻抗,與表面孔洞和通道中的擴散有關。極化曲線外推法和電化學阻抗研究都表明納米晶銅的腐蝕電流比微米晶銅高,而極化電阻要低。
A modified definition of polarization resistance calculated from the equivalent circuit of eis make its value dependent on the grain size . in anodic polarization test ( sweeing and stair - steps ) , the maximum ( critical ) current density increases while the passivation potential and breakdown potential lowers with the reduction of the grain size . fegsem images showed the grain growth and pitting corrosion of the nc copper surface , uniform corrosion in the mc copper surface and the broken passivation layer in both surfaces 在陽極極化實驗(包括掃描法和臺階法)中,致鈍電流雖晶粒尺寸減小而增大,而致鈍電位和擊穿電位都隨著晶粒細化而降低。 fegsem照片發(fā)現(xiàn)了納米晶銅的晶粒長大和孔蝕,微米晶銅表面的均勻腐蝕,和兩種銅表面破碎的鈍化膜。