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GH3625合金在SO2酸性環(huán)境下的高溫腐蝕行為
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1.蘭州理工大學省部共建有色金屬先進加工與再利用國家重點實驗室;2.金川集團股份有限公司鎳鈷資源綜合利用國家重點實驗室

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國家重點研發(fā)計劃項目 (No. 2017YFA0700703);國家自然科學基金項目(No. 51661019);甘肅省科技重大專項項目 (No.145RTSA004);鎳鈷資源綜合利用國家重點實驗室基金項目( No. 301170503)；


High temperature corrosion behavior of GH3625 alloy under acidic atmosphere SO2
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the National Key Research and Development Program of China (No. 2017YFA0700703); the National Natural Science Foundation of China (No. 51661019); the program for Major Projects of Science and Technology in Gansu Province (No.145RTSA004); the Program for State Key Laboratory Nickel and Cobalt Resources Comprehensive Utilization ( No. 301170503) and Hongliu first-class discipline construction plan of Lanzhou University of Technology.

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    摘要:

    這項工作研究了GH3625合金在900 ℃的SO2酸性環(huán)境下的腐蝕行為。通過掃描電子顯微鏡（SEM），能量色散譜（EDS）和X射線衍射（XRD）研究了腐蝕后試樣的表面形態(tài)和腐蝕產(chǎn)物。通過SEM，EDS和電子探針微量分析儀（EPMA）檢查橫截面形態(tài)，以觀察樣品內(nèi)部的腐蝕。研究結(jié)果表明：GH3625合金在酸性氣氛下的腐蝕速率隨SO2含量的增加而輕微增加。合金表面形成了一層主要是Cr2O3的致密氧化膜，這層氧化層可以有效阻止SO2擴散到合金基體內(nèi)部。另外，基體內(nèi)部的鉻能夠以CrS的形式與硫元素結(jié)合，減緩腐蝕。GH3625合金在高溫SO2環(huán)境中具有優(yōu)異的耐腐蝕性。

    Abstract:

    This work investigates the corrosion behavior of GH3625 alloy under acidic atmosphere SO2 at 900 ℃. The surface morphologies of the corroded specimens and the corrosion products were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The cross-sectional morphology was examined by SEM, EDS, and electron probe micro-analyzer (EPMA) to observe the internal corrosion. The results demonstrate that the corrosion rate of the GH3625 alloy only slightly increased with increasing SO2 content in the acidic environment. A dense oxide film (primarily Cr2O3) forms on the alloy surface which can effectively prevent SO2 from diffusing into the interior of the alloy matrix. Additionally, chromium inside the matrix can combine with sulfur (primarily CrS) retarding corrosion. GH3625 alloy exhibits excellent corrosion resistance under an SO2 environment.

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丁雨田,王靖劼,馬元俊,高鈺璧,陳建軍,張東. GH3625合金在SO2酸性環(huán)境下的高溫腐蝕行為[J].稀有金屬材料與工程,2021,50(4):1118~1124.[dingyutian, wangjingjie, mayuanjun, gaoyubi, chenjianjun, zhangdong. High temperature corrosion behavior of GH3625 alloy under acidic atmosphere SO2[J]. Rare Metal Materials and Engineering,2021,50(4):1118~1124.]
DOI：10.12442/j. issn.1002-185X.20191068

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  • 收稿日期:2019-12-18
  • 最后修改日期:2020-01-31
  • 錄用日期:2020-02-20
  • 在線發(fā)布日期: 2021-05-08
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