{"id":692,"date":"2026-11-04T00:30:28","date_gmt":"2026-11-03T16:30:28","guid":{"rendered":"http:\/\/www.dipobisnis.com\/blog\/?p=692"},"modified":"2026-11-04T00:30:28","modified_gmt":"2026-11-03T16:30:28","slug":"what-types-of-damages-can-be-repaired-by-thermal-spray-48a9-431e27","status":"publish","type":"post","link":"http:\/\/www.dipobisnis.com\/blog\/2026\/11\/04\/what-types-of-damages-can-be-repaired-by-thermal-spray-48a9-431e27\/","title":{"rendered":"What types of damages can be repaired by thermal spray?"},"content":{"rendered":"

If you\u2019ve ever walked through a manufacturing plant, you\u2019ve probably seen a piece of heavy industrial equipment sidelined because of a small, costly damage: a worn shaft on a pump, a corroded heat exchanger tube, a cracked gear in a conveyor system. For decades, repair teams would write those parts off or schedule weeks of downtime to machine new components. As a thermal spray supplier for over 12 years, I\u2019ve seen firsthand how thermal spray technology changes that story\u2014turning \u201cbeyond repair\u201d components back into high-performing, long-lasting assets, often at a fraction of the cost and time of full replacement. Thermal Spray<\/a><\/p>\n

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Thermal spray isn\u2019t a single process; it\u2019s a family of techniques that feed molten or semi-molten materials (think ceramics, metals, metal alloys, or even polymers) through a high-velocity gas stream, so they speed through the air and fuse tightly to a prepared surface of your part. The key advantage here is flexibility: depending on which material we spray and how we prepare the part, we can target almost any type of surface damage that plagues industrial components. Let\u2019s break down the most common damages we repair with thermal spray, and why it matters for your operations.<\/p>\n

First, the damage we encounter most often is surface wear. For rotating parts like shafts, bearings, and gears, wear is usually abrasive (from friction against dirt, metal shavings, or process debris) or adhesive (when two metal surfaces stick and tear away material as they move). A 2022 study from the American Society of Mechanical Engineers (ASME) found that abrasive and adhesive wear account for 80% of unplanned equipment downtime in manufacturing, mining, and oil and gas sectors. A classic example: a pump shaft in a water treatment plant that\u2019s worn down 2 millimeters at the bearing seat from years of rotating against a metal bearing. If we used traditional machining to build up the worn area, we\u2019d end up with a weld that\u2019s prone to cracking and adds unnecessary weight to the shaft. Thermal spray is different: we can use a metal alloy like cobalt-chrome or tungsten carbide, which has exceptional hardness and wear resistance, and spray a precise, uniform layer just thick enough to restore the shaft\u2019s original diameter. The bond isn\u2019t just a surface layer\u2014because the particles are high-velocity, they mechanically interlock with the prepared, grit-blasted surface of the shaft, so the coating won\u2019t flake off even after thousands of hours of operation. Last year, a customer in the agricultural sector had 12 worn combine harvester shafts repaired with our tungsten carbide coatings; they reported zero additional wear on those parts in three full harvest seasons, compared to the 12-month average they saw with new, uncoated shafts.<\/p>\n

Next, corrosion damage is another major issue that thermal spray fixes, especially for parts exposed to harsh environments. Corrosion isn\u2019t just rust on steel\u2014it\u2019s the breakdown of metal from exposure to chemicals, saltwater, high-temperature exhaust, or acidic process fluids. For offshore drilling rig components, chemical processing equipment, or even shipboard parts, corrosion can eat through a part\u2019s wall until it\u2019s too thin to hold pressure or function safely. Thermal spray can address this in two ways: first, we can apply a corrosion-resistant barrier coating, and second, in some cases, we can rebuild corroded metal surfaces to their original dimensions. For example, a heat exchanger tube in a petrochemical plant that\u2019s developed pitting corrosion on its inner wall from exposure to corrosive process gases. Instead of replacing the entire tube bundle (which can cost tens of thousands of dollars and take weeks to install), we can use thermal spray to apply a ceramic coating like aluminum oxide or yttria-stabilized zirconia (YSZ) to the inner surface. This coating acts as a non-reactive barrier, stopping corrosive gases from reaching the underlying steel, and the repair takes just a few days of downtime. For parts that have lost material due to corrosion\u2014like a valve body that\u2019s been eaten away at the flange\u2014we can use a zinc or aluminum alloy, which is sacrificial and provides cathodic protection to the underlying steel, so even if a small flaw develops in the coating, the base metal won\u2019t corrode. A 2021 report from the National Association of Corrosion Engineers (NACE) noted that thermal spray corrosion coatings extend part life by 3 to 10 times compared to uncoated components in high-corrosion environments, making it a far more sustainable option than full replacement.<\/p>\n

Cracking is a damage that many repair methods struggle with, but thermal spray handles it well\u2014especially small, structural cracks in components that can\u2019t be replaced easily. Think of a gear tooth on a heavy-duty conveyor system in a mine: a small crack from repeated stress can turn into a catastrophic failure if left unaddressed. Traditional welding would heat the entire gear, which could cause warping or alter the gear\u2019s precision teeth geometry, requiring additional machining work. With thermal spray, we can first clean out the crack with a specialized tool, then spray a ductile metal alloy like nickel-chromium (NiCr) into the space. The NiCr coating is flexible, so it expands and contracts with the gear as it operates, preventing the crack from growing. We also apply a layer of hard chrome or tungsten carbide to the tooth\u2019s surface to protect it from future wear. A mining customer I work with regularly sends us gearboxes with hairline cracks in the planet gears; instead of replacing the entire gearbox (which costs over $50,000), we repair the gears for less than 10% of that cost, and the repaired parts perform as well as new ones in some cases. It\u2019s important to note that thermal spray isn\u2019t a solution for large, through-cracks that compromise a part\u2019s structural integrity\u2014for those, we\u2019d recommend more extensive structural welding. But for the small, operational cracks that cause most unplanned failures, it\u2019s a perfect fix.<\/p>\n

Another less talked-about damage is thermal fatigue and heat-related degradation, common in high-temperature components like turbine blades, engine exhaust manifolds, and furnace linings. These parts are exposed to repeated cycles of heating and cooling, which cause tiny cracks, peeling surface layers, and a gradual loss of material over time. Thermal spray\u2019s ceramic coatings are ideal here because they\u2019re engineered to withstand extreme temperatures and thermal shock. For example, a gas turbine blade in a power plant that\u2019s lost its thermal barrier coating (TBC) from 1,200\u00b0F (650\u00b0C) operating temperatures. A new TBC would be expensive to apply, but we can use atmospheric plasma spray (APS), a type of thermal spray, to apply a new 300-micron layer of YSZ to the blade\u2019s surface. The YSZ has a low thermal conductivity, so it insulates the underlying metal blade from high heat, reducing thermal fatigue and extending the blade\u2019s life by another 5 to 7 years. Last year, a power utility customer had 48 turbine blades repaired with this method; they saw a 15% increase in turbine efficiency after the repair, because the blades weren\u2019t losing heat to the surrounding exhaust.<\/p>\n

Now, I want to be honest: thermal spray isn\u2019t a one-size-fits-all repair solution. There are limits. We can\u2019t repair parts that have suffered catastrophic failure\u2014like a broken shaft that\u2019s snapped entirely, or a heat exchanger tube that\u2019s corroded through to the point of collapse. We also can\u2019t repair parts with complex internal geometries that are hard to access for surface preparation and coating, since thermal spray requires a clean, rough surface for the coating to bond to. That\u2019s why the first step we take with every customer is an on-site assessment: we inspect the damaged part, review its operating conditions, and recommend whether thermal spray is the best option, or if another repair or replacement method makes more sense.<\/p>\n

As a thermal spray supplier, what sets our services apart is that we don\u2019t just apply a coating\u2014we tailor every repair to the part. For example, if you\u2019re working with food processing equipment, we use FDA-compliant polymers for coatings that won\u2019t react with food products. If you\u2019re in aerospace, we apply coatings that meet strict FAA regulations for weight and durability. We also offer on-site repair services for large, hard-to-move parts, like turbine rotors or heavy-duty gearboxes, so you don\u2019t have to disassemble and transport them to a shop, saving even more downtime.<\/p>\n

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If you\u2019re tired of replacing industrial parts that you thought were beyond repair, or if you\u2019re looking to cut maintenance costs and extend your equipment\u2019s lifespan, our team would be happy to walk you through how thermal spray can help. Whether you\u2019re dealing with worn shafts, corroded heat exchangers, cracked gears, or heat-damaged turbine parts, we can provide a customized repair solution that fits your operations and budget. Reach out to our team to schedule a consultation and see how thermal spray can change the way you approach equipment maintenance.<\/p>\n

Resistance Welding Electrode<\/a> References<\/p>\n

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  1. American Society of Mechanical Engineers. (2022). Wear Failure Analysis in Industrial Rotating Equipment. ASME Press.<\/li>\n
  2. National Association of Corrosion Engineers. (2021). Thermal Spray Coatings for Corrosion Protection: Best Practices and Performance Data. NACE International.<\/li>\n
  3. Dhindaw, B. K., & Singh, H. (2019). Thermal Spray Technology for Industrial Repair and Maintenance. Springer.<\/li>\n
  4. International Organization for Standardization. (2020). ISO 14956: Thermal Spray \u2014 Quality Assurance of Thermally Sprayed Coatings. ISO.<\/li>\n<\/ol>\n
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    Foshan Jiafengrui New Materials Technology Co., Ltd.<\/a>
    We are one of the most professional thermal spray manufacturers and suppliers in China, also support customized service. Please feel free to wholesale high quality thermal spray in stock here from our factory. Welcome to view our website for more information.
    Address: Room 902,Building 5,Tongde Intelligent Manufacturing Park, Dawei Road No.1, Shangjiashi Community, Ronggui Subdistiict, Shunde District,Foshan,Guangdong,China
    E-mail: dollyliu@jfr-tungsten.com
    WebSite:     https:\/\/www.jfr-tungsten.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

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