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Rust Converter Research Information

2002

Hello there,

1. I'm looking for some hard core research on corrosion converter product that are out today. Not sales type information. But corrosion research data that can be backed up?
2. Need information in these areas:
3. Is there a difference in these two terms "corrosion inhibitor" verses "corrosion converter"? Is there a difference in the use of these terms?
4. Is a corrosion converter acidic?
5. If a corrosion converter is used and entrapped in gaps between welded steel parts could the welds fail? Is this better because mechanical means by sandblasting or wire brush may not get deep down into micro pores?
6. Would coming back after mechanical means with a rust converter [on eBay or Amazon] be a much better method to increase corrosion protection?
7. After the rust converter [on eBay or Amazon] is use would it be be better to have a primer applied on the rust converter [on eBay or Amazon] primer then apply a topcoat. Four part method like this (Mechanical removal + rust converter [on eBay or Amazon] to Magnetite, Fe3O4 + primer surfacer + topcoat)?
8. With this method would one achieve the maximum protection possible?
9. Is there any chemical change to the metal that continues on with this product there. Or once the process end is that it. No future adverse effects?
10. Do you know of any Internet links for research data on rust converter [on eBay or Amazon] s?
11. Do you know of any aircraft companies using a rust converter [on eBay or Amazon] or on parts as a field method?

Thanks,

Eric Patterson
- Wichita, Kansas

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I would like to know for rust remover before use because to protect our members.

Mochamad Isrofil
- Gresik, East Java, Indonesia
2003

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rust converter [on eBay or Amazon] s only need slight rust removal to prevent any loose particles, then apply and allow to cure for a min of 24 hrs, overcoating with primer is essential, rust converter [on eBay or Amazon] s are acid based and they chemically cure to provide a permanent bond to all types of rusty steel.

Trust the above helps, regards.

Phil Bench
chemicals and paint production - New Zealand
2003

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February 9, 2009

Hi.
There are really basic answers on your questions. See relative numbers.
3. Corrosion inhibitor is chemical, with physical or chemical bonds to metal, preventing (there are different ways) corrosion occurrence or progression. It is "shield" against corrosion. Corrosion converter is chemical mixture reacting with ferric corrosion (mostly, some products react also with pure metal)) by chemical bonds on inert polymer-metal compound. It is transforming corrosion (or metal surface) on different organic substance preventing corrosion spreading. There are also corrosion passivators chemically reacting with metals and creating surface micro-layer with high resistance for corrosion attack.
4. Chemical and paint companies produce many types of corrosion converters based on different chemical reactions. Therefore some from them are acidic (frequently) but some from them aren't.
5. If you apply quality rust converter [on eBay or Amazon] then resistance for further corrosion is better as any mechanical means. When corrosion ones started it is going on because there is free electron gap moving along metallic structure. To finish this process there is necessary remove a lot of metal. On the other hand some converters create on surface layer with separation properties for further welding.
6. There are plenty methods how to obtain high protection for corrosion. There is hard to say generally which one is better. On the first place man have to ask, what final treatment and protection, on exact material, I am looking for. If you know answer, then the best method could be proposed.
7. The best method for application of any corrosion converter is this: Mechanical removing of soft rust (brushing), degreasing, application of converter, priming (not necessary for the all converters but in some cases it is increasing topcoat adhesion), top-coating.
8. Maximum possible protection is by plastics (hot-melt) coating or chrome plating. Method of corrosion protection depends on final product application, finishing etc.
9. Chemical bonds between rust (or metal) and converter are very strong. There is hard to break them. Theoretically ones is surface treated there aren't any changes. Practically some converters are sensitive to UV, alkalis, acids, some solvents, etc. That's why is necessary to cover them by suitable topcoat.
11. Some aircraft companies use converters for repairs, not for new parts. Converters are also frequent for repairs of military vehicles or boats. Nevertheless in Germany are forbidden for boats.

Peter Stuchlik

Peter Stuchlik
- Blucina, Czech Republic