(February 1, 1999)
solution@95 C |
duration of test (hr) |
weight loss (mg/cm3) |
5% HCl |
24 |
< 0.01 |
5% NaOH |
6 |
1.2 |
.02N Na2CO3 |
6 |
0.17 |
5% H2SO4 |
24 |
< 0.01 |
H2O |
24 |
< 0.01 |
contact: Mary Edwards (June 15, 1998, updated from ULE catalog)
Corning Inc. Canton Plant 334 County Route 16 Canton, NY 13617 tel 315-379-3200
(Back to Page Top)
(V. Zitelli 1997, C&C, e-mail Jan 29/99)
Experiment for LBT(Large Binocular Telescope, 8.4 m x 2)
Chemical bath in one month, surface roughness measured by Wyko interferometer.
group 1
group 1 |
roughness (nm) |
rms (nm) |
initial condition |
0.92 |
0.16 |
HNO3 (32%) |
0.83 |
0.05 |
HCl (18%) |
1.21 |
0.23 |
KOH (5%?) |
3.44 |
0.06 |
NaOH (20%) |
5.82 |
0.82 |
group 2 |
roughness (nm) |
rms (nm) |
initial condition |
0.52 |
0.06 |
HNO3 (32%) |
0.52 |
0.06 |
HCl (18%) |
0.50 |
0.04 |
KOH (5%?) |
0.44 |
0.07 |
NaOH (20%) |
1.86 |
0.15 |
Valentina Zitelli, zitelli@astbo3.bo.astro.it
(Back to Page Top)