Bronze Disease Advice Needed Please!

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One of the problemes with almost any sure cure for such reactions with Bronze is actually the materials that make up Bronze. Note that Bronze and Brass are basically composed of Copper.
Normally Brass is Copper, 1% Tin, 30% Zinc approxiamately.
Bronze, however, although is also primarily Copper, it also contains Tin and varieous other substances such as Manganese, Aluminum, Phosphorus, even silicon and many, many other substances to make it appear as the users prefer.
In most, not all, instances where anything containing Copper turns Green, it is usually due to a reaction with a Sulfurous type of Acid.
In many areas where Sulfur rich coal is burned, power stations and many factories with boilers, the emissions are SO or SO2. This mixes with the moisture in the air in the form of H OH, otherwise noted as H2O, producing the mild type of H2SO3 or H2SO4 in the air.
In such areas people find their Copper pipes, Copper grounding systems, Copper Fenials on top of buildings turning Green from this what is normally called Acid Rain. In some areas it is so bad major comapanies have gone to insulated grounding systmes or even Lead covered Copper wiring. In the Illinois area ComEd Electric has gone to almost all coated wiring for grounding systems and in many places have replaced Copper Ground Rods with Stainless Steel due to the amount of Acid Rain in that area.
The point is possibly in your area such air contaminates are present and not much in the way of removing moisture from the coins will be that much benificial. I would actually try to soak those coins in very warm distilled water for a while, then blow dry them with a warm hair dryer. After that do anything you can to stop any air from getting to those or any Copper type of coins. Many such containers on the market for just that purpose.

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By chemical reactions inside the coin, I'm referring to what I've read about bronze conservation of antiquities from experts in this field. I am a retired chemist, have zero experience in ancient artifact conservation, but do recall reading that this bronze disease can continue even though an effort has been made to seal the coin's surface. I think some of the confusion might be that at the microscopic level it is extremely difficult to completely isolate a coin from the surrounding environment...even with the clear tape you mentioned molecules of air and other gaseous contaminants can still get through. In order to be more specific I would have to do a little research on the chemistry of the bronze disease to refresh my memory on what is happening to the internal structure of the coin. However, I do recall that the science and chemistry regarding this continuing degradation inside a presumably sealed coin seemed consistent with basic chemistry reactions.

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15th International School on Quantum Electronics: Laser Physics and Applications. Edited by Dreischuh, Tanja; Taskova, Elena; Borisova, Ekaterina; Serafetinides, Alexander. Proceedings of the SPIE, Volume 7027, pp. 702707-702707-10 (2008).
Laser cleaning tests were performed on ancient (Roman and Byzantine) coins, which belong to the collection of the Numismatic Museum of Athens, Greece. Coins with various types of surface corrosion were studied, using Q-switched Nd:YAG, CO2 and Er:YAG lasers and a range of laser pulsing parameters on dry and wet surfaces. A section of each object was cleaned mechanically, by the conservators of the museum in order to show the results of this method. It was discovered that the results of laser cleaning was influenced by the type of corrosion of the surface of the coins. X-ray fluorescence was applied as analytical technique. The results show that XRF could provide detail information about the surface chemical nature of the treated objects, as well as about their past and present state and it leaded to recommendations for restoration with the appropriate laser cleaning conditions.

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Well, if you are going to talk about chemistry then you should learn chemistry first. Not only is your comment not true, but if you would review your freshman chemistry you will see that atoms are mostly space. "Too tightly packed and nothing can slip in?" How about you put a thin sheet of pure copper in front of you and then have someone aim x-rays in your direction and we'll see what slips through. We're dealing with ancient bronze coins...we're not talking about a hunk of 99% copper here, or a hunk of a reasonably pure copper alloy. Really, these things have been in the ground for two millenia and to say that chemical reactions on these coins will only occur on the surface defies logic, common sense, and any chemistry I studied.

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Good Lord, I'm not talking about putting a chlorine atom between two copper atoms, I'm talking about a chlorine atom reacting WITH a copper atom. Why is it so hard for you to understand this simple concept? And I repeat, your comment that chemical reactions cannot take place in the interior of a coin is ridiculous. Teach you chemistry? What could be more simple than stating that a copper atom can react with a chlorine atom to produce Copper (I) Chloride? Why do you insist that I'm trying to shove chlorine atoms between two copper atoms? I'm not. It is a copper atom reacting with a chlorine atom. It is also called freshman chemistry, Chemistry 1A, bonehead chemistry....perhaps you need to get your chemistry books out of storage and review them.

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however, chemical reactions within the interior of the coin can still occur resulting in damage and destruction of the bronze coin.