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鎳基合金腐蝕極化曲線的量子力學(xué)解釋
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國(guó)家自然科學(xué)基金(51175403, 51301132); 國(guó)家重大科技專項(xiàng) (2011ZX06004-009)


Interpretation of the Polarization Curve of Alloy 690 by Quantum Mechanics
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    摘要:

    鎳基合金Alloy 690廣泛應(yīng)用于高溫?fù)Q熱管道中，對(duì)其腐蝕機(jī)理的準(zhǔn)確分析可以為設(shè)備提供有效的防腐手段。針對(duì)腐蝕表面金屬氧化膜具有半導(dǎo)體的性質(zhì)，利用量子力學(xué)的相關(guān)知識(shí)獲得在不同電位下腐蝕過(guò)程所對(duì)應(yīng)的能帶結(jié)構(gòu)圖，分析了產(chǎn)生電流的機(jī)理和特點(diǎn)；并從理論上推導(dǎo)出了腐蝕過(guò)程中腐蝕電位與電流的相互關(guān)系；從微觀上解釋了腐蝕的動(dòng)力學(xué)機(jī)理。結(jié)果顯示：Alloy 690的腐蝕過(guò)程實(shí)際上是一種電子的轉(zhuǎn)移和傳遞過(guò)程，該過(guò)程中電流主要由溶液、氧化膜和金屬界面的產(chǎn)生-復(fù)合、擴(kuò)散、隧穿和雪崩4種電子的轉(zhuǎn)移過(guò)程所控制。由理論得到的腐蝕電位與電流的關(guān)系與相關(guān)的實(shí)驗(yàn)結(jié)果有很好的一致性，表明用量子力學(xué)從微觀上揭示腐蝕的動(dòng)力學(xué)機(jī)理是合理的

    Abstract:

    Knowing the correct corrosion mechanism of Alloy 690 is valuable for corrosion protection of equipment. Considering the semiconductor characteristics of metal oxide film on the corrosion surface, a new corrosion dynamics mechanism was proposed based on the quantum mechanics. At first, the nature and characteristics of currents were analyzed in different applied potentials by the band structures of metal. Then the relationship between corrosion potential and current was developed and the kinetic mechanism of corrosion was explained from microscopic view. The results show that the corrosion process is controlled by four kinds of electron transfer named generation-compound, diffusion, tunneling and avalanche in the interface of solution, oxidation film and metal. It is reasonable to interpret the polarization curve of Alloy 690 by quantum mechanics because this relationship has very good consistency with that of experiments

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胡 軍,馬登龍,張?jiān)缧?段 權(quán),胡海軍,程光旭.鎳基合金腐蝕極化曲線的量子力學(xué)解釋[J].稀有金屬材料與工程,2014,43(5):1173~1176.[Hu Jun, Ma Denglong, Zhang Zaoxiao, Duan Quan, Hu Haijun, Cheng Guangxu. Interpretation of the Polarization Curve of Alloy 690 by Quantum Mechanics[J]. Rare Metal Materials and Engineering,2014,43(5):1173~1176.]
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  • 收稿日期:2013-05-14
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  • 在線發(fā)布日期: 2014-10-13
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