A Better Alternative to Spray Welding
Many people still refer to the process of applying metal coatings to repair worn and damaged metal components as spray welding. But there are more modern alternatives that have emerged that allow for enhanced precision during application and long-term durability. That includes thermal spray processes that use high-velocity oxygen fuel and plasma to provide better adhesion and heat control.
What is Spray Welding?
It’s a welding process in which molten or semi-molten metal is sprayed onto a surface to create a restorative coating. A wire or metal rod is melted and propelled toward the target surface at a high rate of speed, allowing it to fuse and solidify. You can use spray welding to restore dimensions and protect equipment from corrosion and wear. Spray welding encompasses various methods, including flame spraying. That method heats a powder until it reaches a semi-molten state, which is blown onto the substrate with compressed air.
Modern Alternatives to Spray Welding
The following spray welding processes offer unique benefits for specific applications and coating types.
HVOF Coating
High-velocity oxygen fuel coating is a thermal spray process that uses high-speed combustion to propel metal onto a surface, creating a dense coating. It features low porosity, corrosion resistance and enhanced wear protection. It’s suitable for hydraulic cylinders, industrial machinery and aerospace components.
Plasma Sprays
Plasma spraying is more advanced and requires extremely hot plasma to melt the coating material onto metals, alloys and ceramics. Its extreme hardness and heat resistance provide thermal insulation and corrosion protection. Plasma sprays are available in ceramic coatings, chromium oxide and aluminum oxide to protect parts against damage caused by friction and chemicals.
Choosing the Right Coating for Your Application
Finding the right coating technique depends on your specific application and the performance requirements of the component. Factors like the extent of wear, corrosion resistance, operating temperature and coating thickness will influence the thermal spray process. For example, if you have equipment that’s exposed to high speed and wear, it could benefit from HVOF coatings. High-temperature or insulation applications may require ceramic plasma sprays.
There isn’t a “one-size-fits-all” solution, which is why expert consultation is essential. Hale Performance Coatings works closely with you to evaluate those factors so we can recommend the most effective coating process and ensure proper application. Our expertise allows us to guide you toward the right technology and process that aligns with your operational needs.
Work with a Proven Thermal Spray Coating Provider
Hale Performance Coatings has decades of experience in the industrial coatings industry. Our process is driven by simplicity and a commitment to providing you with plating services of the highest caliber. Our staff maintains consistent training schedules to enhance their knowledge and expertise of various coating processes, including HVOF, electroless nickel finishing, hard chrome coating and rubber mold coating. That allows us to provide you with high-quality finishes that can reduce operating costs and optimize mechanical function.
Contact us to learn more about our products and services.
FAQs
Is spray welding the same as thermal spraying?
They’re similar but aren’t the same. Spray welding is an older term that refers to the process of melting and fusing metal to a base material. Thermal spraying is a broader category that includes different coating technologies like HVOF and plasma spraying.
What’s the difference between HVOF and spray welding?
While spray welding is a fusion-based process, HVOF uses controlled combustion to heat and propel metal powder toward the surface.
Can thermal spray coatings repair worn parts?
Yes.
What materials can be used with thermal spray coatings?
Metals, alloys, carbides, ceramics and composites.