装备环境工程
裝備環境工程
장비배경공정
EQUIPMENT ENVIRONMENTAL ENGINEERING
2013年
2期
4-8
,共5页
周和荣%揭敢新%赵越%李晓刚
週和榮%揭敢新%趙越%李曉剛
주화영%게감신%조월%리효강
SO2污染%失重法%交流阻抗%局部交流阻抗
SO2汙染%失重法%交流阻抗%跼部交流阻抗
SO2오염%실중법%교류조항%국부교류조항
SO2 environment%mass loss method%EIS%LEIS
采用扫描电镜(SEM/EDX)、失重法、交流阻抗谱和局部交流阻抗研究了纯铝1060在0.004 mol/L Na2SO4(pH=3.1)溶液中的腐蚀行为和规律.研究结果表明,纯铝1060在模拟溶液中连续浸泡720 h后,材料质量损失与浸泡时间的关系符合指数规律即C=A·tn;腐蚀产物形貌为不规则的团状或块状,分析表明腐蚀产物为氢氧化铝和硫酸铝水合物;交流阻抗结果显示纯铝1060腐蚀速率随浸泡时间的延长逐渐降低;局部交流阻抗图谱显示材料表面局部阻抗随时间而变化,并形成点蚀.
採用掃描電鏡(SEM/EDX)、失重法、交流阻抗譜和跼部交流阻抗研究瞭純鋁1060在0.004 mol/L Na2SO4(pH=3.1)溶液中的腐蝕行為和規律.研究結果錶明,純鋁1060在模擬溶液中連續浸泡720 h後,材料質量損失與浸泡時間的關繫符閤指數規律即C=A·tn;腐蝕產物形貌為不規則的糰狀或塊狀,分析錶明腐蝕產物為氫氧化鋁和硫痠鋁水閤物;交流阻抗結果顯示純鋁1060腐蝕速率隨浸泡時間的延長逐漸降低;跼部交流阻抗圖譜顯示材料錶麵跼部阻抗隨時間而變化,併形成點蝕.
채용소묘전경(SEM/EDX)、실중법、교류조항보화국부교류조항연구료순려1060재0.004 mol/L Na2SO4(pH=3.1)용액중적부식행위화규률.연구결과표명,순려1060재모의용액중련속침포720 h후,재료질량손실여침포시간적관계부합지수규률즉C=A·tn;부식산물형모위불규칙적단상혹괴상,분석표명부식산물위경양화려화류산려수합물;교류조항결과현시순려1060부식속솔수침포시간적연장축점강저;국부교류조항도보현시재료표면국부조항수시간이변화,병형성점식.
@@@@The corrosion behavior and mechanism of 1060 aluminum in 0.004 mol/L Na2SO4 solution was investigated using SEM, mass loss, electrochemical impedance spectroscopy (EIS) and local electrochemical impedance spectroscopy (LEIS) method. The results showed that mass loss accords with exponential rule as C=A·tn after 720 h immersion. Surface observation showed that corrosion product is agglomerate and accidented;the corrosion product is made of alumina and aluminum sulfate hydrate. The EIS results revealed that the corrosion rate of 1060 aluminum gradually becomes low with increase of immersion time. LEIS results indicated that the local electrochemical impedance on the specimen surface changes with the immersion time and the pitting has occurred.
