Old Hoppes No. 9 Good For Corrosive Primers?

I don't know whether this is true, but a friend of mine claims that peroxide cleans it out rapidly and effectively. If anyone else tried this or tries it, I'd love to know the real answer.
 
If you want a highly effective bore cleaner that works on corrosive priming, try RB-17. It is water soluble, non toxic, and is hell on lead fouling.
 
I don't know whether this is true, but a friend of mine claims that peroxide cleans it out rapidly and effectively.
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I've never heard of using it, but it would make sense as hydrogen peroxide is a water based solution. H2O2 is also the weakest acid, so I don't know what other effects it would have on the metal.
 
A combination of hydrogen peroxide and vinegar used to be used as a lead remover, but the problem with that is that it would often pit barrel steel.
 
Good information, guys. The corrosive agent is indeed potassium chloride, KCl, which is an even more aggressive salt than sodium chloride, NaCl, table salt. I worked in fertilizer R&D where KCl is the cheapest source of "potash" plant food, and we had a full time metallurgist working on corrosion resistance.

Except that the main constituent of "corrosive" primers is potassium chlorate, KClO3, not potassium perchlorate, KClO4.
 
"which is an even more aggressive salt than sodium chloride"

Care to expand on that?

More hygroscopic?

Produces a more reactive solution when it does draw water to itself?

Something else?
 
I assume what Jim is referring to is that potassium, with its higher atomic number, has its single electron in the outer shell at a lower energy level so it can form positive ions more readily (i.e., it has a higher electropositivity factor).

How that ties in with the topic here is that a solution containing potassium ions will cause iron/steel to corrode faster than sodium ions, and much, much faster than plain water.
 
Except that the main constituent of "corrosive" primers is potassium chlorate, KClO3, not potassium perchlorate, KClO4.
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Actually, both are used as priming ingredients, but I have always heard it referred to as perchlorate.
 
"...He never got a straight answer as to why..." Doesn't require as much time to get the rifle clean. Can't have that. The OR's need to be kept busy. snicker.
"...Current Hoppe's 9 does not mention corrosive primer..." That's because corrosive primers haven't been used since the 50's. Only seen these days in old milsurp ammo. In any case, it's the water content that flushes the salts, not the chemicals.
 
Another thing to remember is that there is no such thing as a chemical that can "neutralize" a salt. Salts are essentially acids that have already been neutralized.
For example a strong acid like hydrochloric acid (muriatic acid) and a strong base such as sodium hydroxide (lye) will neutralize each other to form sodium chloride (table salt).

The only thing you can do is get rid of salts by flushing with something that dissolves salts, and nothing dissolves salts better than plain old water.

There are some salts that are insoluble in water (silver chloride for example) but those won't rust your barrel either.
 
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