I have been using a Dream tank (BT804) for a few weeks now and loving it. I read a post earlier where someone was asking about a stainless steel version because he had exposed brass inside the chimney. I took mine apart to change the wick and looked inside the chimney to find that the chrome plating was chipped and very incomplete.
Does anyone know if these things are actually made of chrome plated brass? I thought I may have read somewhere that e-juice shouldn't be exposed to brass, but wasn't sure so I did a quick search on google and found this:
[h=1]Composition of Common Brass Alloys[/h][h=2]What is brass made from?[/h]By Terence Bell, About.com Guide
Brass alloys can be made using a variety of compositions in order to meet the exact demands of a given application.
Although copper and zinc form the basis of any brass, aluminum, lead and arsenic are often used as alloying agents to improve machinability and corrosion resistance.
The chart below summarizes the composition of a number of commonly used brass alloys:
[h=2]Compositions of Common Brass Alloys[/h]
Source: Azom.com
URL: Metal Alloys - Properties and Applications of Brass and Brass Alloys by Austral Wright Metals
I have no idea if long term exposure to a brass alloy with a lead content even as low as 0.03% is harmful, but tossed my Dream tank just to be sure. If these are made of chrome plated brass, HOW STUPID IS THAT?
Does anyone know if these things are actually made of chrome plated brass? I thought I may have read somewhere that e-juice shouldn't be exposed to brass, but wasn't sure so I did a quick search on google and found this:
[h=1]Composition of Common Brass Alloys[/h][h=2]What is brass made from?[/h]By Terence Bell, About.com Guide
Brass alloys can be made using a variety of compositions in order to meet the exact demands of a given application.
Although copper and zinc form the basis of any brass, aluminum, lead and arsenic are often used as alloying agents to improve machinability and corrosion resistance.
The chart below summarizes the composition of a number of commonly used brass alloys:
[h=2]Compositions of Common Brass Alloys[/h]
| UNS No. | AS No. | Common Name | BSI No. | ISO No. | JIS No. | Copper % | Zinc % | Lead % | Other |
| C21000 | 210 | 95/5 Gilding metal | - | CuZn5 | C2100 | 94-96 | ~5 | <0.03 | - |
| C22000 | 220 | 90/10 Gilding metal | CZ101 | CuZn10 | C2200 | 89-91 | ~10 | <0.05 | - |
| C23000 | 230 | 85/15 Gilding metal | Cz103 | CuZn20 | C2300 | 84-86 | ~15 | <0.05 | - |
| C24000 | 240 | 80/20 Gilding metal | Cz103 | CuZn20 | C2400 | 78.5-81.5 | ~20 | <0.05 | - |
| C26130 | 259 | 70/30 Arsenical brass | Cz126 | CuZn30As | C4430 | 69-71 | ~30 | <0.07 | Arsenic 0.02-0.06 |
| C26000 | 260 | 70/30 Brass | Cz106 | CuZn30 | C2600 | 68.5-71.5 | ~30 | <0.05 | - |
| C26800 | 268 | Yellow brass (65/35) | Cz107 | CuZn33 | C2680 | 64-68.5 | ~33 | <0.15 | - |
| C27000 | 270 | 65/35 Wire brass | Cz107 | CuZn35 | - | 63-68.5 | ~35 | <0.10 | - |
| C27200 | 272 | 63/37 Common brass | Cz108 | CuZn37 | C2720 | 62-65 | ~37 | <0.07 | - |
| C35600 | 356 | Engraving brass, 2% lead | - | CuZn39Pb2 | C3560 | 59-64.5 | ~39 | 2.0-3.0 | - |
| C37000 | 370 | Engraving brass, 1% lead | - | CuZn39Pb1 | C3710 | 59-62 | ~39 | 0.9-1.4 | - |
| C38000 | 380 | Section brass | Cz121 | CuZn43Pb3 | - | 55-60 | ~43 | 1.5-3.0 | Aluminum 0.1-0.6 |
| C38500 | 385 | Free cutting brass | Cz121 | CuZn39Pb3 | - | 56-60 | ~39 | 2.5-4.5 | - |
URL: Metal Alloys - Properties and Applications of Brass and Brass Alloys by Austral Wright Metals
I have no idea if long term exposure to a brass alloy with a lead content even as low as 0.03% is harmful, but tossed my Dream tank just to be sure. If these are made of chrome plated brass, HOW STUPID IS THAT?
