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Sandblast Stainless Steel by Silicate

06/17/2013 5:28 AM

Can we sandblast stainless steels body of pump with silicate's sand or not ?

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Guru
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#1

Re: Sandblast Stainless Steel by Silicate

06/17/2013 3:10 PM

Sure, why not, but why do you want to, does it need cleaning or paint removal or something?

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#2
In reply to #1

Re: Sandblast Stainless Steel by Silicate

06/18/2013 2:22 AM

yes we want reblasting by silicate sandno by and then painting again

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Guru
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#3
In reply to #2

Re: Sandblast Stainless Steel by Silicate

06/18/2013 3:16 PM

Then go ahead (unless anyone here on CR4 knows something I don't that would make this potentially a bad idea in this particular application).

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Guru
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#4

Re: Sandblast Stainless Steel by Silicate

06/20/2013 11:51 PM

Sand blasting and ultrasonic cleaning and drying before next painting process is usually done. Sand grain size is important and perhaps to start with course and then fine grain will be ideal for good finish. If you wish to retain roughness on the surface for paint binding then do not use very fine polishing finish else paint will simply peal off easily.

If you do ultrasonic cleaning then use low frequency 25kHz frequency ultrasonic cleaner which will keep the surface roughness and remove the sand grains.

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#5

Re: Sandblast Stainless Steel by Silicate

06/26/2013 1:38 PM

Only if you have NOT used the same equipment for blasting carbon or alloy steel. If there is any carry over of iron/steel particles they can become embedded in the stainless bodies and will nucleate corrosion cells.

So the quality / purity of the sand (free from iron) is important.

Or else you can plan on repassivating after the blasting .

Milo

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#6

Re: Sandblast Stainless Steel by Silicate

06/27/2013 10:56 AM

There are other media that may be better than sand for this purpose.

Glass beads are commonly used for this purpose. Sodium bicarbonate and even ground walnut shells can be used to remove paint without fear of metal erosion.

Dry ice is also used when erosion or contamination is a concern.

Sand would be my last choice.

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#7
In reply to #6

Re: Sandblast Stainless Steel by Silicate

06/27/2013 2:27 PM

Actually alloy steel shot would be my last choice, but you are correct to suggest other media, Lyn. Not sure if many of those are available locally there.

Milo

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#8
In reply to #7

Re: Sandblast Stainless Steel by Silicate

06/27/2013 3:54 PM

How true. I'm sure they have plenty of sand in "south arabeia" . I'm assuming that Arabia is the location.

I might even be inclined to chemically strip it. Less chance of residual abrasives that way.

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Users who posted comments:

bahman (1); jack of all trades (2); lyn (2); Milo (2); Shyam (1)

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