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  • 1.  Thermal Arc Spray to inside of 39mm via holes

    Posted 01-30-2023 23:03
    Hi Everyone

    We are an applicator of TMS in Australia primarily to structural steel items.

    We are looking at a large thermal spray project.
    One small part of the project requires the thermal spray coating (300 microns) of the inside of a 39mm diametre hole x 100mm deep in steel plate 1200-off. We would only have access from one side of the plate.

    Also we need to be able to coat the bottom face of the plates say 20mm (ie 80mm dia)
    See sketch attached. (note sketch refers to "blast" but we also need to coat the area marked in red)

    Can the group offer any advice on how the TMS can be done to a verifiable standard and who has or can develop the equipment required. (Note we are ok in achieving the abrasive blast). We also consider the top 40mm in depth to be easily achieved but concerned beyond that as the angle deposit becomes shallow.

    Any advice be much appreciated

    Peter
    IMG_0324.jpeg

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    Peter Way
    Charmhaven
    61243503600
    ------------------------------
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  • 2.  RE: Thermal Arc Spray to inside of 39mm via holes

    Posted 01-31-2023 11:07
    Dear Peter,

    For sure spraying a coating inside a 39 mm ID is a major challenge. The only equipment I am aware of that may be able perform your requirement is the Praxair SG100 APS torch with the 2700 Extension.

    Please go to this website (https://www.praxairsurfacetechnologies.com/en/materials-and-equipment/coating-equipment/thermal-spray-coating-systems/plasma-spray) and open the TAFA Model 2700 Extension torch.

    I hope it helps!

    Rogerio



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

    e-mail: rogerio.lima@nrc-cnrc.gc.ca
    ------------------------------

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  • 3.  RE: Thermal Arc Spray to inside of 39mm via holes

    Posted 01-31-2023 11:14
    oops... The previous link I sent seems to be not working via TSS Online Community. 

    Hopefully this will work: Plasma Spray | Praxair Surface Technologies

    www.praxairsurfacetechnologies.com/en/materials-and-equipment/coating-equipment/thermal-spray-coating-systems/plasma-spray

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

    e-mail: rogerio.lima@nrc-cnrc.gc.ca
    ------------------------------

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  • 4.  RE: Thermal Arc Spray to inside of 39mm via holes

    Posted 01-31-2023 15:32
    Hi
    Thanks for the responses so far. Rogerio, I believe the plasma extension torch would be able to access the works.
    Pardon my ignorance but not too familiar with the plasma spray process. What spray medium would be most effective for corrosion protection. Looking at 60 year durability in a C4 (semi marine environment). The rest of the project is 300 microns of zinc-aluminium 85/15 thermal arc spray on a piece of major infrastructure. All to be done in-situ.

    Thanks

    Peter Way
    T: 0417 260 446



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  • 5.  RE: Thermal Arc Spray to inside of 39mm via holes

    Posted 01-31-2023 15:53
    Hi Peter,

    I am glad to know that the initial info was useful.

    Your new question is pertinent... but I am not a "corrosion person". Hopefully someone in this TSS Online Community will be able to address your remark... and continue the discussion. 

    Cheers!

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

    e-mail: rogerio.lima@nrc-cnrc.gc.ca
    ------------------------------

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  • 6.  RE: Thermal Arc Spray to inside of 39mm via holes

    Posted 02-01-2023 08:17
    This, in some form, may also be suitable to spray that ID:

    https://flame-spray.com/ptwa-applications/

    Best regards,

    Bob Miller
    6533 Woodmere Circle
    Indianapolis, IN 46260 USA
    +1 317-698-5479 Mobile
    +1 317-259-7632 Home



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  • 7.  RE: Thermal Arc Spray to inside of 39mm via holes

    Posted 02-01-2023 19:53
    Thanks Bob

    Have sent them an enquiry. 

    kind regards


    Peter Way
    Managing Director

    p: 1300 502 132





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