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Suitable sodium nitrite levels to inhibit corrosion

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I work at an factory that sends aerosol cans through a water bath with sodium nitrite among other things to inhibit corrosion. Does anybody know what is the recommended concentration of sodium nitrite in ppm to use as a rust inhibitor. Couldn't find anything in print to include in my training manual.
Thank so much in advance.

Jim W [last name deleted for privacy by Editor]
quality assurance - Viburnum, Missouri

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Dear Jim,

I am also interested in the responses you have received to your question.

Long ago, at a company I worked, we used to add sodium nitrite to prevent rust forming on pressure vessels put in water tank to perform pressure tests.

But I cannot remember the concentration. Now at another company I want to do same...

help / input would be appreciated.

Thanks

Stan p [last name deleted for privacy by Editor]
air conditioning - Staunton, Virginia

February 15, 2010

Nitrite level should be 1000-1500 ppm.

Thushara [last name deleted for privacy by Editor]
- Sri lanka

Corrosion and Corrosion Control

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