Abstract In this study zirconium incorporated Cr 3 C 2 -(NiCr) coating has been sprayed on three superalloys viz. Superni 718, Superni 600 and Superco 605 using D-gun technique. A comparative study has been carried out to check the cyclic oxidation in air and hot corrosion in simulated incinerator environment (40%Na 2 SO 4 -40%K 2 SO 4 -10%NaCl-10%KCl) for the coated specimens at 900 °C for 100 cycles. Oxidation kinetics has been established for all the specimens using weight change measurements. Corrosion products have been characterized using X-ray diffractometer (XRD) and scanning electron microscopy/energy-dispersive analysis (SEM/EDAX). Cr 3 C 2 -(NiCr) + 0.2%wtZr coating provides very good corrosion resistance in air oxidation for all the three coated superalloys. As all the three coated superalloys shows parabolic behaviour with parabolic rate constant as 0.07 × 10 −10 (g 2 cm −4 s −1 ) for Superni 718, 0.43 × 10 −10 (g 2 cm −4 s −1 ) for Superni 600 and 0.3 × 10 −10 (g 2 cm −4 s −1 ) for Superco 605 This coating is also effective in the molten salt environment but coating on Co-based superalloy Superco 605 did not perform satisfactorily. The parabolic rate constants for coated Superni 718 is 0.61 × 10 −10 (g 2 cm −4 s −1 ), for coated Superni 600 is 6.72 × 10 −10 (g 2 cm −4 s −1 ) and for coated Superco 605 is 17.5 × 10 −10 (g 2 cm −4 s −1 ).

中文翻译：

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一项评估掺锆 Cr 3 C 2 -(NiCr) 涂层在 900°C 下的腐蚀性能的比较研究

摘要 在这项研究中，掺锆 Cr 3 C 2 -(NiCr) 涂层已喷涂在三种高温合金上。Superni 718、Superni 600 和 Superco 605 使用 D-gun 技术。已对涂层试样在 900 ℃下在模拟焚烧炉环境 (40%Na 2 SO 4 -40%K 2 SO 4 -10%NaCl-10%KCl) 中的空气循环氧化和热腐蚀进行了对比研究。 °C 进行 100 次循环。已经使用重量变化测量为所有样品建立了氧化动力学。腐蚀产物已使用 X 射线衍射仪 (XRD) 和扫描电子显微镜/能量色散分析 (SEM/EDAX) 进行表征。Cr 3 C 2 -(NiCr) + 0.2%wtZr 涂层为所有三种涂层高温合金在空气氧化中提供了非常好的耐腐蚀性。由于所有三种涂层高温合金都显示抛物线行为，Superni 718 的抛物线速率常数为 0.07 × 10 -10 (g 2 cm -4 s -1 )，Superni 为 0.43 × 10 -10 (g 2 cm -4 s -1 ) Superco 605 为 600 和 0.3 × 10 -10 (g 2 cm -4 s -1 ) 这种涂层在熔盐环境中也很有效，但在 Co 基超级合金 Superco 605 上的涂层表现并不令人满意。有涂层的 Superni 718 的抛物线速率常数为 0.61 × 10 -10 (g 2 cm -4 s -1 )，有涂层的 Superni 600 为 6.72 × 10 -10 (g 2 cm -4 s -1 ) 和有涂层的 Superco 605是 17.5 × 10 -10 (g 2 cm -4 s -1 )。Superco 605 为 3 × 10 -10 (g 2 cm -4 s -1 ) 这种涂层在熔盐环境中也很有效，但在 Co 基超级合金 Superco 605 上的涂层表现并不令人满意。带涂层的 Superni 718 的抛物线速率常数是 0.61 × 10 -10 (g 2 cm -4 s -1 )，带涂层的 Superni 600 是 6.72 × 10 -10 (g 2 cm -4 s -1 ) 和带涂层的 Superco 605是 17.5 × 10 -10 (g 2 cm -4 s -1 )。Superco 605 为 3 × 10 -10 (g 2 cm -4 s -1 ) 这种涂层在熔盐环境中也很有效，但在 Co 基超级合金 Superco 605 上的涂层表现并不令人满意。有涂层的 Superni 718 的抛物线速率常数为 0.61 × 10 -10 (g 2 cm -4 s -1 )，有涂层的 Superni 600 为 6.72 × 10 -10 (g 2 cm -4 s -1 ) 和有涂层的 Superco 605是 17.5 × 10 -10 (g 2 cm -4 s -1 )。