本文選題：Pb-Ag-RE合金　切入點(diǎn)：鉛基陽(yáng)極　出處：《金屬學(xué)報(bào)》2015年03期

【摘要】：采用恒流極化,SEM,XRD,EIS和Tafel掃描對(duì)比研究了Pb-Ag-RE合金陽(yáng)極在無(wú)Cl-和含500 mg/L Cl-H2SO4溶液中的腐蝕行為和析氧行為.結(jié)果表明,Pb-Ag-RE陽(yáng)極在含Cl-電解液中生成的氧化膜層出現(xiàn)"火山口"狀孔洞,合金基底上分布著大量的腐蝕坑,呈現(xiàn)出明顯的局部腐蝕特征.此外,Cl-的存在會(huì)減少陽(yáng)極表面氧化膜層中Pb O2的含量,抑制析氧反應(yīng)中間產(chǎn)物的生成和吸附,進(jìn)而增加析氧反應(yīng)傳荷阻抗.因此,500 mg/L的Cl-對(duì)Pb-Ag-RE合金陽(yáng)極的耐腐蝕性能和析氧活性均會(huì)造成不利影響,工業(yè)生產(chǎn)中應(yīng)盡量降低電解液中Cl-的濃度.
[Abstract]:The corrosion behavior and oxygen evolution behavior of Pb-Ag-RE alloy anode in Cl- and 500 mg/L Cl-H2SO4 solutions were studied by means of constant current polarization (SEM) XRDIS and Tafel scanning.The results show that the oxide film layer formed by Pb-Ag-RE anode in Cl-containing electrolyte has a "crater" hole, and a large number of corrosion pits are distributed on the alloy substrate, showing obvious local corrosion characteristics.In addition, the presence of Cl- can reduce the content of Pb O 2 in the oxide film on the anodic surface, inhibit the formation and adsorption of the intermediate product of oxygen evolution reaction, and then increase the charge transfer impedance of the oxygen evolution reaction.Therefore, the corrosion resistance and oxygen evolution activity of the anode of Pb-Ag-RE alloy can be adversely affected by the Cl- of #number0# mg/L. The concentration of Cl- in the electrolyte should be reduced as far as possible in the industrial production.
【作者單位】： 中南大學(xué)冶金與環(huán)境學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目51204208和51374240 湖南省自然科學(xué)基金項(xiàng)目13JJ1003 中國(guó)博士后科學(xué)基金項(xiàng)目2013M540638 中南大學(xué)中央高�；究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金項(xiàng)目2014zzts028資助~~
【分類(lèi)號(hào)】：TG174

【共引文獻(xiàn)】

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