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Rust in stainless tank

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I have a blending thank that I have a couple light spots of rust in. Just wondering what the proper procedure would be to take care of this.  

 

Looks like just surface rust on a seam about the size of a nickel. 

IMG_8467.JPG

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There are lots of different ways to passivate, but I would rub a little bradford Durustit Wonder Gel on there and then remove it in 20 minutes with some soapy water and the rust will be gone and will probably never return.  If you want to completely passivate the vessel then you will need to do that with nitric acid or citric.  Just do a google search on passivating stainless steel and you will find a tun of info.

 

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Good scouring with an oxalic acid based cleanser (read: barkeepers friend) and then let it dry. Works for us.

 

 

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Do not rub off with regular steel wool, it will make it worse in the long run

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The majority of these are on the weld line.  Rather get some pickling paste from some SS welders.

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13 hours ago, Hudson bay distillers said:

paul how strong citric acid do you suggest 

tim 

You should do a google search on that.  We never use citric.  We use the wonder gel.

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