Upsilon
Hazard to Others
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 392
Registered: 6-10-2013
Member Is Offline
Mood: No Mood
|
|
Phosphoric acid glass treatment?
I happened to stumble upon this abstract:
http://www.sciencedirect.com/science/article/pii/00223093709...
I was aware that extremely hot molten phosphoric acid attacks glass, but the article also mentions that this process creates a protective layer of
silicon phosphate, which reduces the mechanical strength of the glass, but apparently offers protection against glass-etching fluoride ions. Can
anyone confirm this? It seems very interesting.
|
|
BromicAcid
International Hazard
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 3237
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
Just let me take a second to connect the two topics...
http://www.sciencemadness.org/talk/viewthread.php?tid=62676
|
|
Upsilon
Hazard to Others
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 392
Registered: 6-10-2013
Member Is Offline
Mood: No Mood
|
|
Huh, I could have sworn I didn't find any other topics. Oops.
|
|
j_sum1
Administrator
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 6269
Registered: 4-10-2014
Location: Unmoved
Member Is Offline
Mood: Organised
|
|
I have heard this before on these boards.
If I recall, the consensus was that the weakening was significant, the protective layer was of indeterminant value and that with fluorine you just
don't take any chances.
Do a search and see what you find. A mod might even merge threads for you.
[edit]
Beaten by two posts.
That was fast.
[Edited on 1-10-2015 by j_sum1]
|
|
Upsilon
Hazard to Others
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 392
Registered: 6-10-2013
Member Is Offline
Mood: No Mood
|
|
Well, while on the topic, does this mean that phosphoric acid is a feasible candidate for dissolving very unreactive metal oxides, such as TiO2? Since
it is clearly capable of dissolving SiO2.
|
|