Corrosion Resistance of 410 and 4140

• Sep 23, 2002

• #2

mcguire

Materials

Nov 2, 2001

1,086

The 410 won't pit unless there is a chloride present, so you're safe there. Neither will it be corroded in a general sense by this mixture.
Carbon and alloy steels, such as 4140, are attacked by acetic acid at all concentrations. The attack will not take the form of pitting. The corrosive attack during cleaning should be negligible if you're a quick cleaner.

 

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• Sep 24, 2002

• #3

rustbuster1

Materials

May 30, 2001

128

I wonder why you wouldn't just polish up a piece of each metal and dunk it in the cleaning process you intend to use. Close examination will show you if any harm arises. I suspect none of the sloultions you mention will cause real corrosion but they may etch the carbon steel.

This appraoch falls under the rubrick of "One test is worth 100 opinions."

 

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• Sep 24, 2002

• Thread starter
• #4

Carburize

Materials

Sep 23, 2002

702

Under normal circumstances I would agree completely but when all one has is the part to clean the alternative to "no test" is to gather the 100 opinions.

 

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• Sep 24, 2002

• #5

mcguire

Materials

Nov 2, 2001

1,086

Maybe the best of all is to get onto Eng-tips.com and find out from someone who has already done the test.

 

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• Sep 24, 2002

• #6

stonerabroad

Materials

Jul 23, 2002

27

the data i've got for 410SS and vinegar says it's resistance up to 70F is good (in a concentration of 100%)gut the carbon steel is not so good at any concentration over 8%.

as for the peroxide...carbon steels aren't recommended at any concentration at any temperature. the 410 is good up to 90F.

so...i'd recommend testing out a sample as well, if possible.

 

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• Sep 24, 2002

• #7

mcguire

Materials

Nov 2, 2001

1,086

Hydrogen peroxide is harmless to 410 up to boiling at any concentration. It IS safer to test. We all give advice, but in the end you're responsible, so take precautions.

 

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• Sep 25, 2002

• Thread starter
• #8

Carburize

Materials

Sep 23, 2002

702

Two components cleaned using the mixture - it worked like a charm -

 

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• Oct 3, 2002

• #9

shooter45

Materials

Oct 3, 2002

13

How do I tell the difference between a stainless steel barrel and a 4140 one??

 

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• Oct 8, 2002

• #10

rustbuster1

Materials

May 30, 2001

128

To Shooter 45 - put a drop of 10% or so nitric acid on the barrel at a suitable place - 4140 will produce a green spot 410 will do nada.

 

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