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Author Topic: Need help with question regarding glass  (Read 2030 times)

Offline Heyheyhey451

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Need help with question regarding glass
« on: 28/11/2013 04:00:06 »
So here's the story

My work has to do with melting and fusing  borosilicate glass

The components are used in various environments but for the most part usually involve water

The thing is when the components are taken out to be cleaned there is this blooming effect or foggy ness around where the glass was welded together

No cleaner and I've tried about 50 kinds have worked

My guess is when heating the glass and welding it together, little microscopic bubbles formed and popped leaving craters

And it seems that on a molecular level the craters are so small that no cleaners have small enough agents, I guess structure wise to penetrate the microscopic craters

Anyone know of anything that can clean the buildup of calcium and others minerals like that?
 


 

Offline Don_1

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Re: Need help with question regarding glass
« Reply #1 on: 28/11/2013 14:24:14 »
Have you tried a mild acid, such as acetic?
 

Offline Heyheyhey451

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Re: Need help with question regarding glass
« Reply #2 on: 28/11/2013 15:14:40 »
Have you tried a mild acid, such as acetic?

I've tried vinegar compounds but not 99.85 % like I found on Amazon, really hope this works, thank you very much!!
 

Offline Don_1

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Re: Need help with question regarding glass
« Reply #3 on: 28/11/2013 15:44:27 »
I'm sure you don't need me to tell you to take great care when handling any acid.
 

Offline CliffordK

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Re: Need help with question regarding glass
« Reply #4 on: 28/11/2013 20:33:23 »
I've seen repaired glassware that looks as good as new.

I presume everything is preheated before fusing.  Then, after fusing, it goes back in the furnace for slow cooling down.

Could humidity be a problem?  Too low of a temperature?  Impurities in the glass before fusing?
 

Offline Bored chemist

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Offline Heyheyhey451

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Re: Need help with question regarding glass
« Reply #6 on: 29/11/2013 16:04:06 »
Yea it's more probable that it's due to overheating the glass where the welds are happening, some areas are impossible to get to phisically

Thus the Acid method seems to be the go to method at this point

As suggested above, what other acids would you guys suggest just in case the acetic doesn't perform?

Thanks in advance!
 

Offline Heyheyhey451

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Re: Need help with question regarding glass
« Reply #7 on: 17/12/2013 16:49:54 »
Any one else with nah other methods?
 

Offline dlorde

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Re: Need help with question regarding glass
« Reply #8 on: 18/12/2013 15:32:59 »
... what other acids would you guys suggest just in case the acetic doesn't perform?
I use warm citric acid for general-purpose descaling. It's very effective and far more pleasant to use than acetic acid, especially for kettles, jugs, etc. I buy it by the kilo (around 4) as crystals from a place that does supplies for home-made soap (which apparently uses citric acid). The more you get the cheaper it is.
 

The Naked Scientists Forum

Re: Need help with question regarding glass
« Reply #8 on: 18/12/2013 15:32:59 »

 

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