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Rust prevention of iron metal parts in high humidity storage in open air

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Q. My problem is to prevent the corrosion of the iron wire and coils from corrosion during storage in high humidity warehouse and during the transport by vessels.

Emel Dincer
auxiliary chemicals producer - ISTANBUL, KADIKOY, TURKEY


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A. Your question is a bit vague, Emel. Can the parts be painted or plated or black oxided, or must they stay "raw"? Is the product already pickled & oiled? If this a small product like guitar strings, which conceivably could be protected with VCI packaging or desiccant, or is it large coils of raw steel to be fed into automatic screw machines?

If the latter, you probably can dip the parts in some sort of rust preventer. But any such rust preventative is a temporary measure, of course, and we really don't have enough data from you yet about issues like that. Good luck!

Ted Mooney
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


January 9, 2012

My follow up question is that my company manufactures small metal stampings and have customers in Malaysia and China. As cost of plating there is so much cheaper than what we can provide, customers are asking for parts in oiled state. We are having issues having the steel stampings remain rust free for when they plate, even though the parts are oiled. We have found out that sealed cardboard boxes, with inner bag liner, is not working and that the area where boxes are being stored is not controlled. Does anyone have any suggestions for guidelines we can give our customers to extend life of the parts? We are already replacing current oil to a water-displacing version but need help giving them further details.

Adrienne Brown
- Chicopee, Massachusetts, USA


January 12, 2012

Have you considered a small bag of silicate... like you get when purchasing some household items? Another thought would be to wrap your components in vapour paper.

Terry Hickling
Birmingham, United Kingdom


January 17, 2012

Emel,

Under the conditions that you have described for storage of your wires and coils, epoxy coating should help solve your problem.

Adrienne,

Consider packing your components in the VCI bags with silica gel small bags in them for absorption of moisture for such a long distance of sea environment.

Kishore Phadnis
- Mumbai, Maha, India

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