CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...
CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...
CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...
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ISO<strong>CORROSION</strong> DIAGRAMS·<br />
HASTELLOY® Alloy B-2<br />
Resistance to Hydrochloric Acid<br />
with 500 ppm Ferric Ions<br />
250 Corrosion rates in parentheses are in mm/year.<br />
- Boiling Point Curve<br />
125<br />
LL<br />
Over 200 mpy<br />
,~ .<br />
0 200 (Over 5.08) 0<br />
'I<br />
I W W<br />
0 0<br />
W 200 mpy W<br />
a: (5.08)<br />
a:<br />
::> ::><br />
f-<br />
f-<br />
« 75 «<br />
a: a:<br />
w<br />
w<br />
(L (L<br />
~ 150 50-200 mpy ~<br />
w<br />
w<br />
f- (1.27-5.08) f-<br />
\<br />
----<br />
\<br />
50<br />
50 mpy<br />
(1.27)<br />
100<br />
10,000<br />
4,000<br />
0 10 20 30 40<br />
CONCENTRATION, WEIGHT PERCENT<br />
HASTELLOY® Alloy B-2<br />
Effect of Ferric Ion Concentration<br />
on Corrosion Rate of Alloy B-2<br />
Corrosion rates in parentheses are in mm/year.<br />
Boiling 20% HCI<br />
100<br />
0<br />
---_ Boiling 30% H 2<br />
SO J<br />
/<br />
>- 1,000<br />
(L<br />
/<br />
~<br />
/<br />
w /<br />
f- /<br />
«<br />
a: 400 /<br />
z<br />
/<br />
0 /<br />
en /<br />
0<br />
a:<br />
/<br />
a: /<br />
0<br />
0<br />
/<br />
100<br />
/<br />
/<br />
___1 ______ 50 mpy<br />
40<br />
--------<br />
(1.27)<br />
10 '---_--'-------l.---'---'---....1-.L--'--'---'---_--'-------l.-----l.---'---'--'---'--'---'---_--'-------l.-----l.---'---'--'-....L..l...J<br />
1 2 4 6 8 10 20 40 6080100 200 400 600800<br />
FERRIC ION CONCENTRATION, PPM<br />
•All test specimens were solution heat-treated and in the unwelded condition.<br />
64
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