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首页> 外文期刊>Chemical and Petroleum Engineering >THERMAL DIFFUSION COATINGS FOR PROTECTION FROM GAS CORROSION, COKE DEPOSITION, AND CARBURIZATION
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THERMAL DIFFUSION COATINGS FOR PROTECTION FROM GAS CORROSION, COKE DEPOSITION, AND CARBURIZATION

机译：用于防止气体腐蚀，焦炭沉积和碳化的热扩散涂层

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摘要

Much equipment in the oil refining and chemical industries operates with hot gas flows that can cause rapid corrosion. For example, in plant for the catalytic purification of oil products, reactors for desulfurization, thermal cracking, and so on equipment is frequently subject to damage by sulfur-bearing compounds at 400-750℃. Equally important problems are the carburization of tube metal and coke deposition on the inner surfaces in furnace coils in large plant for the pyrolysis of ethylene at 900-1100℃ or more [3]. Under those conditions, it is economically unfavorable or else ineffective to use corrosion-resistant steels or nickel alloys. Thermal-diffusion coatings resolve such problems. Protection Mechanism for Thermal-Diffusion Coatings in Gas Media. These coatings are made by diffusing certain elements such as C, N, B, Si, and Al in the atomic state from an external medium (solid, gas, vapor, or liquid) at a high temperature (usually 900-1100℃).
机译：炼油和化学工业中的许多设备在热气流下运行，会导致快速腐蚀。例如，在用于石油产品催化净化的工厂中，脱硫，热裂解等设备的反应器经常会在400-750℃下受到含硫化合物的破坏。同样重要的问题是在900-1100℃或更高温度下乙烯的热解过程中，大型装置的炉盘内管金属的渗碳和焦炭沉积[3]。在这些条件下，使用耐腐蚀钢或镍合金在经济上不利或无效。热扩散涂层解决了这些问题。气体介质中热扩散涂层的保护机制。这些涂层是通过在高温（通常为900-1100℃）下从外部介质（固体，气体，蒸气或液体）中扩散原子状态的某些元素（如C，N，B，Si和Al）制成的。

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