振動式電脈沖沉積鋁化物微晶涂層對Cr5Mo鋼高溫腐蝕性能的影響

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基金項目:

國家自然科學基金(59801002)和中國石化集團金陵石化有限公司資助項目

High-temperature Corrosion Behavior of Cr5Mo Steel with Micro-crystalline Aluminide Coating by Vibratile Electro-pulse Deposition

1. SINOPEC Jinling Petrochemical Corporation, Nanjing 210037, China;
2. Beijing Key Laboratory for Corrosion, Erosion and Surfase Technology University of Science and Technology Beijing, Beijing 100083, China;
3. School of Materials, Hebei University of Science and Technology, Shijiazhuang 050054, China

摘要: 采用振動式電脈沖沉積裝置在Cr5Mo鋼表面沉積了厚度達100μm的鋁化物微晶涂層.在沉積涂層的過程中,鋁電極與工件瞬時接觸放電,產生很高的溫度,形成了鐵鋁金屬間化合物涂層;電極瞬時分離,涂層迅速冷卻,獲得了微晶結構,而且涂層與基體具有冶金結合.600℃空氣中氧化200h,600℃流動的99.98%SO₂氣氛中硫化50h的實驗結果和SEM,XRD分析結果表明,沉積鋁化物做晶涂層后Cr5Mo鋼的抗氧化、硫化性能均得到大幅度提高.
- 電脈沖沉積 /
- 鋁化物涂層 /
- Cr5Mo
Abstract: A micro-crystalline aluminide coating of 100μm thick was obtained by vibratile electro-pulse deposition on Cr5Mo steel. An Fe-Al intermetallic compound layer forms due to high temperature during instant discharging between alumimum electrodes and specimens, micro-crystalline structure is achieved due to the high cooling rate during deposition, and the coating bonds with the substrate firmly. The experimential results of oxidation in air for 200h at 600 ℃ and sulfuration in flowing 99.98%SO₂ for 50h at 600 ℃ and the analysis of SEM and XRD show that the high temperature oxidation and sulfuration resistances of Cr5Mo steel with aluminide coating are greatly improved.
- electro-pulse deposition /
- aluminide coating /
- Cr5Mo