You might try some mag wheel polish but use one with no abrasive qualities to it. I doubt you'd want to alodine it afterwards (because it's ugly) but you might consider taking it apart to clean it and spray a clear over it to prevent it from happening again.Borinken said:I live in Puerto Rico... And (not frequently) have gone to seaside trails... Any idea on how to fix the finish? I'm surprised since all my components are 3x as old as the frame and no rust or finish issues... Weird also tha it is only on 2 spots... tnxs
It's prone to corrosion in general. A few airplanes were made with magnesium parts, and some still exist, but it's usually a bad idea in it's pure form. Some alloys don't corrode as much, but then you start to lose the advantage of magnesium. This is why aircraft are made out of aluminum generally, even though magnesium could offer lighter weight with plenty of strength in some structures.ahimanic said:Magnesium is very prone to salt corrosion. That's why they only use the material for freshwater fishing reels and not for saltwater.
Do you live near the ocean or come in contact with road salt?
I'm with you. un coated magnesium was a bad idea. works good for fork lowers, but they are painted....:thumbsup:Jayem said:It's prone to corrosion in general. A few airplanes were made with magnesium parts, and some still exist, but it's usually a bad idea in it's pure form. Some alloys don't corrode as much, but then you start to lose the advantage of magnesium. This is why aircraft are made out of aluminum generally, even though magnesium could offer lighter weight with plenty of strength in some structures.
I bet just dripping sweat from a hot ride, or sports drink, would be enough to cause corrosion. If you ride in the winter where the salt the roads, that would be the worst. Bare magnesium is a bad idea. Powder coat is probably the best fix.SprocketHead said:I don't know much about metals, but if Magnesium is prone to corrosion from salt, could it be corroding from your sweat? In the lastest MBA, there's a review of the Ephiphany. In the article, they disliked how their calves would rub against the rockers. Just a thought of what could be causing the issue.
I bought an Epithany 2 months ago....... and the problem same to yours appeared recently due to my sweat............. as it;s not serrious as yours.............Borinken said:Has the finish on the Epi Rockers been a problem for anyone?
Any ideas what could be going on with mine? Seems like rust pits :sad: , but they are silver.. Have not tried to polish them out yet... Suggestions?
Ti is heavier than Mg or Al, would not be an advantage. Al is probably the best material for this type of part, just like is used for almost every other frame of this general configuration.blackfly said:This whole point to me is retarded. The added savings in weight from Mg to Al for the rockers, of such size, is negligible. You could add the weight with a sweater (even less) and to introduce a known metalurgical problem when it was not needed is sad. Of course, Tony could of used Titanium to solve the issue, but again his cost conscious mind kicked in. So now he has a warranty issue, and a big one too. You would use 6/4 Ti, but it is extremely tough to cut and machine, so it was excluded. Not so for Mg.
Do you know anyone (that really rides) that is not a "sweaty fellow"?[email protected] said:I think this would have to be a lot of sweat or sorts drink to make this happen so just be aware of this and bathe your baby if in fact you are a sweaty fellow.
Dave
