Ok, somebody help me out here . . . . .. compatibility, galvanic corrosion, etc. IF I understand correctly, this is a moot point, as it has more to do with water and
salts VS electric current passing through. Take, for example the idea of household electrical junctions being made between aluminum and copper. The copper doesn't rot the aluminum out because current is passing through them. There are issues of differences in expansion/contraction; but that's another issue. Here ↓, I'm seeing that silver and aluminum are pretty far apart on the Anodic Index. As far as I understand it, tho, this would not be an issue for button post (alum.) and battery contact (silver) . . .. unless you were
vaping in the dishwasher, or regularly submerged in salt water. Correct?
Anodic index[10][page needed]
Metal Index (V)
Most Cathodic
Gold, solid and plated, Gold-platinum alloy -0.00
Rhodium plated on silver-plated copper -0.05
Silver, solid or plated; monel metal. High nickel-copper alloys
-0.15
Nickel, solid or plated, titanium an s alloys, Monel -0.30
Copper, solid or plated; low brasses or bronzes; silver solder; German silvery high copper-nickel alloys; nickel-chromium alloys -0.35
Brass and bronzes -0.40
High brasses and bronzes -0.45
18% chromium type corrosion-resistant steels -0.50
Chromium plated; tin plated; 12% chromium type corrosion-resistant steels -0.60
Tin-plate; tin-lead solder -0.65
Lead, solid or plated; high lead alloys -0.70
2000 series wrought aluminum -0.75
Iron, wrought, gray or malleable, plain carbon and low alloy steels -0.85
Aluminum, wrought alloys other than 2000 series aluminum, cast alloys of the silicon type
-0.90
Aluminum, cast alloys other than silicon type, cadmium, plated and chromate -0.95
Hot-dip-zinc plate; galvanized steel -1.20
Zinc, wrought; zinc-base die-casting alloys; zinc plated -1.25
Magnesium & magnesium-base alloys, cast or wrought -1.75
Beryllium -1.85
Most Anodic
. . . . . representing the electrical potential they develop in a given electrolyte . . . .
The compatibility of two different metals may be predicted by consideration of their anodic index. This parameter is a measure of the electrochemical voltage that will be developed between the metal and gold. To find the relative voltage of a pair of metals it is only required to subtract their anodic indices.[9]
For normal environments, such as storage in warehouses or non-temperature and humidity controlled environments, there should not be more than 0.25 V difference in the anodic index. For controlled environments, in which temperature and humidity are controlled, 0.50 V can be tolerated. For harsh environments, such as outdoors, high humidity, and salt environments, there should be not more than 0.15 V difference in the anodic index. For example; gold/silver would have a difference of 0.15V being acceptable [10][page needed]
Often when design requires that dissimilar metals come in contact, the galvanic compatibility is managed by finishes and plating. The finishing and plating selected allows the dissimilar materials to be in contact, while protecting the base materials from corrosion.[10][page needed] Note that it will always be the lower-down of the two metals which will ultimately suffer from corrosion when galvanic incompatibility is in play. This is why you should never place sterling silver and stainless steel tableware in a dishwasher at the same time, as the steel items will likely experience corrosion by the end of the cycle (soap and water having served as the chemical electrolyte, and heat having amplified the process).
↑ WIKI
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so the moral here is, don't drop your dibi and then kick it into a wall 
