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  • 1.  Impact of fuel gas on the microstructure of flame-sprayed coatings

    Posted 09-25-2022 10:17

    Hello Everyone,

    Can anyone guide me about the difference in the structure and material properties of the coatings obtained from the flame spray process by using propane as the fuel gas instead of acetylene?

    Given the higher oxygen input that is required for spraying with propane, I know that deposited coatings tend to have more oxides. I am looking for some quantitative data and I would appreciate it if you could introduce me some resources or share your personal experience with me. Thank you very much.



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    Milad Rad, Ph.D.
    Assistant Professor
    University of Southern Indiana
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  • 2.  RE: Impact of fuel gas on the microstructure of flame-sprayed coatings

    Posted 09-27-2022 12:01
    Hi Milad,

    You may wish to contact Prof. Heli Koivuluoto (heli.koivuluoto@tuni.fi) at Tampere University (Finland). She is doing some very nice R&D on flame-spraying of polymers.

    You may also wish to contact Alamo Supply Co. (USA). They manufacture a flame-spray torch (Alamo PG550); which can work with acetylene, hydrogen and propane (http://www.alamosupply.net/PG-550Materials.pdf).

    I hope it helps!

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    Rogerio Lima, PhD
    Senior Research Officer
    National Research Council of Canada
    ASM Thermal Spray Society (TSS) Vice President

    e-mail: rogerio.lima@nrc-cnrc.gc.ca
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  • 3.  RE: Impact of fuel gas on the microstructure of flame-sprayed coatings

    Posted 09-28-2022 09:16
    Hi Rogerio,

    Thank you for guiding me. I highly appreciate your feedback.

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    Milad Rad, Ph.D.
    Assistant Professor
    University of Southern Indiana
    ------------------------------

    Media Kit


  • 4.  RE: Impact of fuel gas on the microstructure of flame-sprayed coatings

    Posted 09-28-2022 09:24
    All things being equal, I think electrically heated air or nitrogen would be best for heating polymer particles.  One wouldn't be limited to specific flame temperatures.

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    Robert Miller
    Materials Engineering Consultant
    R. A. Miller Materials Engineering
    Indianapolis IN
    (317) 698-5479
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  • 5.  RE: Impact of fuel gas on the microstructure of flame-sprayed coatings

    Posted 09-28-2022 18:55
    Thank you, Robert. I appreciate your informative response.

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    Milad Rad, Ph.D.
    Assistant Professor
    University of Southern Indiana
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    Media Kit


  • 6.  RE: Impact of fuel gas on the microstructure of flame-sprayed coatings

    Posted 09-30-2022 00:51
    Hi Milad:
    Propane in air 1980 °C 
    Acetylene in air 2550 °C 
    You may see clearly the difference btwn flame temperatures of both. 
    You will get more un-melted particles in the coating of high melting feedstocks using Propane. However, oxide content will be less. 
    I have next generation Wire-High Velocity oxy fuel gun "HIJET", that produces very dense coatings using wires. 
    You may see my publication

    High-Performance Molybdenum Coating by Wire-HVOF Thermal Spray Process

    10.1007/s11666-018-0706-2 



    ------------------------------
    Dr. Satish Tailor
    Chief Scientist and GM-R&D
    Metallizing Equipment Company Pvt Ltd Jodhpur
    Jodhpur
    +91 8209800266
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  • 7.  RE: Impact of fuel gas on the microstructure of flame-sprayed coatings

    Posted 09-30-2022 12:26
    Hi Satish,

    Thank you for your feedback. I found your publications very helpful. Much appreciated.

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    Milad Rad, Ph.D.
    Assistant Professor
    University of Southern Indiana
    ------------------------------

    Media Kit