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#21
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White Lightning vs. Purple Extreme
2700 miles on a chain? Sounds like the lubricant isn't too good for the chain. I typically get 8000 miles out of my Dura Ace chains before they get 1/8" "stretch" over the ENTIRE length, my criteria for replacement. I use a Quicklink (against recommendations of Shimano, of course) to allow easy removal. I clean in an $40 ultrasonic cleaner with paint thinner, changing the solvent twice. Final rinse is with acetone for quick dry. I lube with White Lightning, letting it dry overnight. Chain cleanings are every 500 miles, give or take a few. If the rollers are rattling, I brush the chain with a large nylon brush until clean, then reapply WL. This gets the majority of the road grit off but the fresh WL looks dark when it dissolves the inside crud. Post mortems of worn chain indicates no perceptable wear of the pins. Only the side plates and rollers are worn. The pins have some kind of carbide/nitride/chromium plating which resists wear. The benefit of my process is a chain that is never too "gunky" to touch and a good year's worth of riding. -- Weisse Luft |
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#22
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White Lightning vs. Purple Extreme
g.daniels Wrote: where does lufte live? what kind of road dirt? sand? Oh yes, there is sand on the roads where I ride. There is also silt and clay. In the cleaning solvent sediment, I can definitely feel the grit that doesn't get attracted to the neoydium magnets (salvaged from old hard drives). Being a chemistry buff, I know a bit on elemental analysis. Since I no longer have access to a XRD, the only elemental analysis I can do is wet chemistry on the sediment. About 22% by mass of the sediment off my chain washings is magnetic ferrous. This is a very fine powder that takes several days to accumulate on the side of the container where the magnet is taped to the outside. I decant the rest of the sludge and wash with 1N NaOH. The washings are collected and allowed to evaporate. From the total mass addition of NaOH and its eventual conversion to Na2CO3*10H20, estimated mass of aluminum is 8%. The remainaing sediment is then treated with HCl to dissolve any non-magnetic metals like Ti (Dura Ace cogs) and non-magnetic ferrous residue. It also dissolves mineral carbonates. This is evaporated mass is a whopping 38% of the total. The rest (32%) is probably silica, silicates and other extraneous lubricant that escaped the initial solvent washings. Since I used non-polar solvent (paint thinner), very little metal is lost in the washings. There is also some losses due to carbonate dissociation but I assume this to regain upon drying and exposure to atmospheric CO2. Keep in mind, it took several chains to accumulate enough sediment to run this test and it was only done for more than subjective reasons. -- Weisse Luft |
#23
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White Lightning vs. Purple Extreme
g.daniels Wrote: where does lufte live? what kind of road dirt? sand? Oh yes, there is sand on the roads where I ride. There is also silt and clay. In the cleaning solvent sediment, I can definitely feel the grit that doesn't get attracted to the neoydium magnets (salvaged from old hard drives). Being a chemistry buff, I know a bit on elemental analysis. Since I no longer have access to a XRD, the only elemental analysis I can do is wet chemistry on the sediment. About 22% by mass of the sediment off my chain washings is magnetic ferrous. This is a very fine powder that takes several days to accumulate on the side of the container where the magnet is taped to the outside. I decant the rest of the sludge and wash with 1N NaOH. The washings are collected and allowed to evaporate. From the total mass addition of NaOH and its eventual conversion to Na2CO3*10H20, estimated mass of aluminum is 8%. The remainaing sediment is then treated with HCl to dissolve any non-magnetic metals like Ti (Dura Ace cogs) and non-magnetic ferrous residue. It also dissolves mineral carbonates. This is evaporated mass is a whopping 38% of the total. The rest (32%) is probably silica, silicates and other extraneous lubricant that escaped the initial solvent washings. Since I used non-polar solvent (paint thinner), very little metal is lost in the washings. There is also some losses due to carbonate dissociation but I assume this to regain upon drying and exposure to atmospheric CO2. Keep in mind, it took several chains to accumulate enough sediment to run this test and it was only done for more than subjective reasons. -- Weisse Luft |
#24
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White Lightning vs. Purple Extreme
guys, get a life...
"justen" wrote in message ... On Sat, 24 Jul 2004 21:31:53 GMT, "Monty" wrote: I used it for over 1,000 and was very happy with it. The chain was quieter and the bike shifted better. I recently put a new chain on the bike and thought I would document the difference. For the first 150 miles I used White Lightning. Then photographed the chain. I then thoroughly cleaned the chain and used Purple Extreme. At 150 miles I, once again, photographed the chain. I rode the same road on both tests. (Wisconsin back roads, generally blacktop or seal coated) When you got the new chain, did you thoroughly clean it before applying White Lightning? Or did you just apply the White Lightning over the lube that came on the chain? justen |
#25
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White Lightning vs. Purple Extreme
guys, get a life...
"justen" wrote in message ... On Sat, 24 Jul 2004 21:31:53 GMT, "Monty" wrote: I used it for over 1,000 and was very happy with it. The chain was quieter and the bike shifted better. I recently put a new chain on the bike and thought I would document the difference. For the first 150 miles I used White Lightning. Then photographed the chain. I then thoroughly cleaned the chain and used Purple Extreme. At 150 miles I, once again, photographed the chain. I rode the same road on both tests. (Wisconsin back roads, generally blacktop or seal coated) When you got the new chain, did you thoroughly clean it before applying White Lightning? Or did you just apply the White Lightning over the lube that came on the chain? justen |
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