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Comparative High-Temperature Corrosion Behavior of Ni-20Cr Coatings on T22 Boiler Steel Produced by HVOF, D-Gun, and Cold Spraying |
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| Authors: | Gagandeep Kaushal Niraj Bala Narinder Kaur Harpreet Singh Satya Prakash |
| Affiliation: | 1. Mechanical Engineering Section, Yadavindra College of Engineering, Punjabi University, Guru Kashi Campus, Talwandi Sabo, Distt., Bathinda, 151302, Punjab, India 2. Mechanical Engineering Department, Baba Banda Singh Bahadur Engineering College, Fatehgarh Sahib, 140407, Punjab, India 3. Indian Institute of Technology Ropar, Rupnagar, 140001, Punjab, India 4. Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India |
| Abstract: | To protect materials from surface degradations such as wear, corrosion, and thermal flux, a wide variety of materials can be deposited on the materials by several spraying processes. This paper examines and compares the microstructure and high-temperature corrosion of Ni-20Cr coatings deposited on T22 boiler steel by high velocity oxy-fuel (HVOF), detonation gun spray, and cold spraying techniques. The coatings’ microstructural features were characterized by means of XRD and FE-SEM/EDS analyses. Based upon the results of mass gain, XRD, and FE-SEM/EDS analyses it may be concluded that the Ni-20Cr coating sprayed by all the three techniques was effective in reducing the corrosion rate of the steel. Among the three coatings, D-gun spray coating proved to be better than HVOF-spray and cold-spray coatings. |
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