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題名 | 熱浸鍍鋁矽鍍層對310不鏽鋼抗高溫硫化腐蝕之影響=Effect of Hot Dipped Al-Si Coating on High-Temperature Sulfidation of 310 Stainless Steel |
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作者 | 白清源; 王則眾; 黃信二; 開物; Bai, Ching-yuan; Wang, Che-chung; Huang, Hsin-erh; Kai, Wu; |
期刊 | 中正嶺學報 |
出版日期 | 20040500 |
卷期 | 32:2(A) 民93.05 |
頁次 | 頁43-58 |
分類號 | 440.365 |
語文 | chi |
關鍵詞 | 熱浸鍍; 鋁矽鍍層; 310不鏽鋼; 硫化腐蝕; 310 stainless steel; Hot dipping; Sulfidation; Al-Si coating; |
中文摘要 | 本研究探討表面鍍鋁矽 (Al-7wt.% Si) 合金鍍層及預氧化處理含鋁矽鍍層之 AISI 310 不鏽 鋼,於硫分壓 10[]~10[]大氣壓,溫度 700~900[]下的高溫硫化行為。鋁矽鍍層是以熱浸鍍法鍍上。研究結果顯示,鋁矽合金鍍層及其預氧化處理皆可降低310不鏽鋼的硫化腐蝕速率。所有含鍍層之鋼材的腐蝕動力學皆遵守拋物線型定律,且腐蝕速率常數隨著溫度及硫分壓之增加而增快。合鋁矽鍍層不鏽鋼的表面,硫化產物主要為硫化鋁 (Al[]s[],及少量的硫化鐵 (FeS/Fe[]S) 、硫化鉻(Ce[]S[]/Cr[]S[]) 、硫化鐵鎳 (Fe,N)[]S[]。令鋁矽鍍層並經預氧化處理之310不鏽鋼,腐蝕後生成不同 的氧化及硫化物;其中,預氧化生成物主要為氧化鋁 (α-Al[]O[]) 及少量氧化矽 (SiO[])、氧化鋁矽 (Al[]SiO[]),硫化生成物則為硫化鋁及微量的硫化鐵、硫化鋒和硫化鐵鎳,並偏於腐蝕層之內側。表面生成連續性的硫化鋁及氧化鋁, 為310不鏽鋼腐蝕速率降低的關鍵因素,其中又以氧化鋁的抗蝕效果較佳。 |
英文摘要 | The high-temperature sulfidation of AISI 310 stainless steel coated with Al-7 wt% Si ( without or with preoxidation treatment ) film was studied over the temperature range 700 ~ 900℃ at 10-2 ~ 10-1 atm sulfur vapor. The Al-Si coating was prepared by hot dipping. The corrosion kinetics followed the parabolic rate law, and the sulfidation rate constants increased with increasing temperature and sulfur pressure in all cases. The scales formed on 310 stainless steel coated with an Al-Si layer consisted of mostly aluminum sulfide (Al2S3) and minor amounts of iron sulfide (FeS/Fe1-XS), chromium sulfides (Cr2S3/Cr3S4), and (Fe,Ni)9S8. The oxides formed on 310 stainless steel coated with an Al-Si layer with preoxidation treatment consisted of mostly α-Al2O3, and minor amounts of SiO2 and Al2SiO5. While the scales formed on the alloys without preoxidation treatment consisted of Al2S3 and minor amounts of FeS/Fe1-XS, Cr2S3/Cr3S4, and (Fe,Ni)9S8. The formation of the continuous layers of α-Al2O3 and Al2S3 was responsible for the reduction of sulfidation rates, and it appeared that α-Al2O3 was the best sulfidation-resistant phase among all scales present. |
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