Corrosion Resistant Fasteners 2

• Apr 12, 2003

1
• #2

evelrod

Automotive

Jan 15, 2001

3,255

Bad.

Rod

 

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• Apr 12, 2003

1
• #3

Metalguy

Materials

Jan 2, 2003

1,412

ansys54,

Interesting. *IF* the pH ends up anywhere near neutral you may be OK-assuming they are mixed well before they reach the steel. The steel will survive the caustic OK, but not the acid. If you need a metal to resist the acid, holler back.

 

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• Apr 12, 2003

• Thread starter
• #4

ansys54

Civil/Environmental

Mar 28, 2003

21

Sodium Hydroxide PH is 14 and 93% Sulphuric is 0.3. I suspect a "Bad" and a "holler back" are consistent with what I thought but wasn't sure until now.
Thanks to both of you.

My specialty is concrete so if I can ever be of help just ask.

 

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• Apr 17, 2003

• #5

tomwalz

Materials

May 29, 2002

947

Sorry,

I didn't get it all?

Is the NaOH and H2SO4 going down a tRench made of concrete or it is lined?

tom

 

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• Apr 17, 2003

• Thread starter
• #6

ansys54

Civil/Environmental

Mar 28, 2003

21

Trench is made of concrete.

 

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• Apr 17, 2003

• #7

Metalguy

Materials

Jan 2, 2003

1,412

Are they mixed *before* they enter the trench? That acid by itself will destroy concrete.

 

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• Apr 17, 2003

• Thread starter
• #8

ansys54

Civil/Environmental

Mar 28, 2003

21

Yes they mix then spill onto a coated floor and run into the trench.

 

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• Apr 17, 2003

• #9

Metalguy

Materials

Jan 2, 2003

1,412

Good! Do you know the approx. pH of the mixture?

 

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• Apr 17, 2003

• #10

kenvlach

Materials

Apr 12, 2000

2,514

I'm curious,
Does your concrete have a coating or sealant for protection?
[If not, I suggest a clear, penetrating epoxy sealer or a coating of Derakane vinylester epoxy]

Do you have an EPA or other government permit for this hazardous waste treatment process?

 

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• Apr 18, 2003

• Thread starter
• #11

ansys54

Civil/Environmental

Mar 28, 2003

21

I don't Metalguy however that's a good and obvious question which I hadn't thought of until now. I will test it.

Kenvlach, this is not effluent and is NOT discharged directly into the environment. It gets recycled back into the process after it enters the trench.

 

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• May 20, 2003

• #12

plasticfreq

Mechanical

May 20, 2003

2

why can't / don't you use an angle made from vinyl ester frp? currently making many parts similar to this application for an electro galvanize line...works beautifully...
plasticfreq

 

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