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Thread: Polish & Etch Aluminum Tig Welds? Stainless Steel?

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    Polish & Etch Aluminum Tig Welds? Stainless Steel?

    Am wanting to check the penetration of my aluminum and stainless steel tig welds.
    Wondering if Loctite rust remover will etch these materials? If not, what works?
    Tig newby, here.
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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    I haven't done it myself but remember reading that the acid for etching PC boards works good it's mostly ferric chloride and hci.. I think... also draino drain cleaner works good

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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    Jody from welding tips and tricks taught me “oven cleaner“

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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?


    robert-r


    Quote Originally Posted by robert-r View Post
    Am wanting to check the penetration of my aluminum
    and stainless steel tig welds.
    Why . . . ?


    Opus



    .

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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    You need alkali - caustic soda - for aluminium.

    I tried some toilet cleaner but it didn't work. I think there was too much hypochlorite in it and not enough hydroxide.

    Acid for steel.

    Not sure what to etch stainless with - I used stainless passivating solution for regular steel, plus some heat. Presumably you need something a fair bit stronger for stainless.

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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    Naval Jelly rust remover ? If its the phosphoric acid stuff , it should work on steel, and stainless steel.

    Like Moto mentioned above, Jodie @ weldingtipsandtricks.com has a really good video on this

    Search "Macro etching welds with household products" Its one of the more popular videos, shouldn't be hard to find.

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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    If you can find 100% lye (sodium hydroxide) in the plumbing section of hardware stores, that could carefully be used to create a caustic solution for aluminum. I hear that stuff eats flesh.
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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    Quote Originally Posted by OPUS FERRO View Post

    robert-r




    Why . . . ?


    Opus



    .
    Same reason a bend tester tests welds coupons Name:  9AA3740A-6535-4ACC-AC29-3ABAE6051978.jpg
Views: 167
Size:  54.4 KBName:  47126B6A-E3F3-4634-A01E-F1389F0D4BC6.jpg
Views: 176
Size:  54.4 KB
    Pretty easy to braze aluminum when inexperienced so he will learn to turn the amps up. Thatís 3/8 aluminum coupon

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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    Quote Originally Posted by motolife313 View Post
    Same reason a bend tester tests welds coupons Name:  9AA3740A-6535-4ACC-AC29-3ABAE6051978.jpg
Views: 167
Size:  54.4 KBName:  47126B6A-E3F3-4634-A01E-F1389F0D4BC6.jpg
Views: 176
Size:  54.4 KB
    Pretty easy to braze aluminum when inexperienced so he will learn to turn the amps up. Thatís 3/8 aluminum coupon
    Nice moto!!!!! as always your pics show the story

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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    Hey all, thanks for the suggestions. Will def check them out.
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    Re: Polish & Etch Aluminum Tig Welds? Stainless Steel?

    Aluma Prep 33 also works for aluminum
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