I know what means rust and also what means dry.

From the context I think it is some substance which coats a surface and acts like a rust inhibitor for a rust protection purpose.

Here is the context:

High corrosion resistance of the cast iron boilers due to application of the dry rust to prevent expansion of corrosion.

I thank you in advance for your help!

  • are you missing is there? Or am I missing something ;) – Maulik V Apr 25 '14 at 6:46
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    @Maulik V, it’s listed as a feature (advantage) without predicate. – Lucian Sava Apr 25 '14 at 6:50
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    I think this is a typo. You can't "apply" rust, which is the result of a chemical process; I think a word has been dropped, probably "application of a dry rust inhibitor". – StoneyB on hiatus Apr 25 '14 at 11:59
  • @StoneyB, I thought the same as you firstly. Reading Josh61’s answer and comments I have started to wonder: What if it is naturally produced and applied (it’s not wet, it’s dry rust). What do you think? On the other hand, I have the file from a Russian manufacturer and there might be mistakes if they didn’t employ a native to make the text. – Lucian Sava Apr 25 '14 at 12:18
  • @LucianSava I speak under correction by a chemist or engineer; but rust is rust, and I see no reason to think that the inhibitive effect of dry rust would be greater than that of wet rust. In any case, I don't think you can apply rust except by mixing it into a binder like paint, and in that case it would be the paint that provides the resistance. Finally, Google "dry rust"--you'll find most of the hits are for "dry rust inhibitor" or "preventive". – StoneyB on hiatus Apr 25 '14 at 12:27

Rust is a form of corrosion, a dry rust forms mainly through the presence of gases in the air.

  • So it’s producing itself like ordinary rust isn’t it? And once produced it prevents further rust penetration in the body, right? It is not a factory made product, right? – Lucian Sava Apr 25 '14 at 8:08
  • It is the result of corrosion trough a dry process , not a wet one. – user5267 Apr 25 '14 at 8:10

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