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News ReleaseNew Technology from Air Products Takes the Heat Off During Thermal Spray Coating Applications

November 08, 2007 Lehigh Valley, Pa.

Air Products (NYSE:APD) has introduced a new thermal spray cooling technology to the North American market that uses cryogenic nitrogen vapor (-320°F) to maintain part temperature during thermal spray coating applications. The company’s United States patent-pending technology makes high-quality thermal spray coatings possible by maintaining part temperature within a pre-defined narrow range, even for heat-intensive spraying processes. The technology can enable the user to apply coatings faster and at a lower cost than traditional cooling methods.

Exposing a part to too much heat can negatively impact coating adhesion, substrate and coating hardness, fatigue life, corrosion resistance and dimensional tolerances. One method used by thermal spray applicators to keep part temperatures within a closely set range is forced air cooling combined with inter-pass breaks. This traditional practice, however, increases downtime and reduces productivity as well as wastes powder and process gases.

"Air Products recognized that thermal spray applicators needed a better solution to maintaining part temperature," said Dr. Rana Ghosh, project manager, cryogenic cooling applications at Air Products. "In response, we developed a thermal spray cooling technology that can maintain a part’s temperature within a much tighter range during the spray operation versus traditional cooling methods by varying the cooling intensity to match the heat generated in the spraying process. Use of our technology can improve part quality, lower costs by reducing powder and process gas waste and enabling the use of inexpensive flexible masking, and allow better utilization of the thermal spray equipment and booth."

Air Products’ thermal spray cooling nozzles can be mounted directly on the robotic arm next to the thermal spraying gun. During spray application, the cryogenic vapor jet follows the thermal spray plume to maintain the part’s temperature within the specified range. Multiple cooling lines can provide additional part cooling, if needed. The part is continuously monitored by a thermal imaging camera and/or infrared sensors that provide temperature feedback to the computer-controlled cooling nozzles, which allows the cooling system to automatically maintain the substrate temperature set by the spray booth operator. The part temperature history also can be recorded and archived for future audit purposes.

Compatible with existing thermal spray systems, Air Products’ technology offers a variety of system designs for application-specific use. The technology can be used in the aerospace, automotive, and heavy industries; oil fields; and job shops. Currently used by a major aircraft parts service facility, Air Products’ technology has cut in half the spraying time and the amount of powder and process gases consumed in the coating of aircraft landing gear axles.

To learn more about Air Products’ thermal spray cooling technology, call 800-654-4567 (code 555), e-mail,  or visit our website at

Air Products (NYSE:APD) serves customers in industrial, energy, technology and healthcare markets worldwide with a unique portfolio of atmospheric gases, process and specialty gases, performance materials, and equipment and services. Founded in 1940, Air Products has built leading positions in key growth markets such as semiconductor materials, refinery hydrogen, home healthcare services, natural gas liquefaction, and advanced coatings and adhesives. The company is recognized for its innovative culture, operational excellence and commitment to safety and the environment. Air Products has annual revenues of $10 billion, operations in over 40 countries, and over 22,000 employees around the globe. For more information, visit  

NOTE: This release may contain forward-looking statements. Actual results could vary materially, due to changes in current expectations.

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Contact Information

  • Press Contact
    Debbie Bauer
    Air Products and Chemicals, Inc.
    7201 Hamilton Boulevard
    Allentown, PA 18195-1501
    (610) 481-6642
  • Investor Contact
    Simon Moore
    (610) 481-7461
    Air Products and Chemicals, Inc.
    7201 Hamilton Boulevard
    Allentown, PA 18195-1501
    (610) 481-2729
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