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| Joined: | Wed May 30th, 2007 |
| Location: | Twin Cities, Minnesota USA |
| Posts: | 104 |
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I understand about temp change and I can see how that might happen but holy crap ...CANT THEY MAKE A GLUE that can go from 80 degrees to 60 degree water ??? ther was nothing that was hard I couldve bumped it on and I wasnt even touching ground or ??? The temp change dissolved the glue in fresh water and for a thousand meter dive watch that is bullS**t !!!
Not that simple (dang, I hate being an engineer sometimes ;))
First of all, it's not about the ambient temperatures. Solar load is what's really is the issue. Ever notice how hot it gets inside your vehicle on a sunny day, even in fall?
We had a wonderful sunny day in the 80's yesterday here in Minnesota and I actually burned my leg on a piece of aluminum patio furniture in a green color that felt more like ~140F (could have even been higher, no idea how much though). face4.gif
Still not close enough to the max. ~170F that cyanoacrylate adhesive (crazy glue) is supposed to handle BUT think of this: your dark blue bezel inlay likely has a lot more temperature rise than the polished, reflective metallic surface of the actual bezel.
Thus, they would expand at different rates (likely also based on the different materials, e.g. aluminum versus steel). This would put stress on the glue (which at high temperatures loses some of its retaining strength). Now I am not sure what glue they used and how it exactly behaves at higher temperatures (e.g. gets gooey and viscose/soft or becomes brittle), but my instinct tells me that that's where the problem likely started. Could the sudden drop in temperature when submerging it in cool water or just the water swooshing in between the bezel and the inlay cause it to come loose? Maybe. I wasn't there so I can't say for sure.
But you've got me curious now: I've got a pretty good multimeter with a temperature head at home and will check surface temperatures based on solar load on some of my watches this weekend. I wonder how hot a black, blue, yellow and silver watch / bezels really get in the sun and how different the temperatures are between them! :)
Cheers
Matt