Development of corrosion resistant thermal diffusion surface engineering for high-temperature recovery boilers

耐力技术公司(ETI)和艾伯塔大学希望在这项Engage Grant的支持下解决的迫在眉睫的行业问题是开发用于暴露在熔盐中的高温回收锅炉的防腐涂料。特别是，行业发起人和申请者将使用热扩散工艺，如渗硼和渗铝来制备铁的硼化物(渗硼工艺)和铝化物，如铁、镍和铬铝化物。这些涂层有望在回收锅炉中常见的高温下具有很高的耐腐蚀性。这项拟议的初步研究的新颖性将是涂层暴露在熔盐腐蚀中，这一特征在回收锅炉中也是典型的。因此，对于具有更复杂结构的涂层和涉及几个保护层的涂层，这些新型涂层系统的性能和可行性将被确定。

The immediate industry problem that Endurance Technologies Inc. (ETI) and the University of Alberta wish to resolve under the auspices of this Engage Grant is the development of corrosion resistant coatings for use in high-temperature recovery boilers exposed to molten salts. In particular, the industry sponsor and the applicant will use thermal diffusion processes such as boronizing and aluminizing to fabricate iron borides (boronizing process) and aluminides such as iron-, nickel-, and chrome-aluminides. These coatings are expected to have high corrosion resistance at the high temperatures that are typically found in recovery boilers. The novelty of this proposed preliminary study will be the exposure of the coatings to molten salt corrosion, a feature that is also typical in recovery boilers. Thus, with coatings with more complex architectures and where a few protective layers are involved, the performance and feasibility of these novel coating systems will be determined.