Nickel Insitute - Nickel Alloys in Organic Acids & Related Compounds
TABLE XXXIX
Corrosion of Alloys in a Nitrile-Type Acrylic Acid Process
Corrosion Rate
Exposure*
1
2
3A
38
4
5
6
7
8
Alloy
mm/y
mpy
mm/y
mpy
mm/y
mpy
mm/y
mpy
mm/y
mpy
mm/y
mpy
mm/y
mpy
mm/y
mpy
mm/y
mpy
Type 304 Stainless Steel Type 316 Stainless Steel Type 201 Stainless Steel CARPENTER alloy 20 INCONEL alloy 600 INCONEL alloy 625 HASTELLOY alloy C HASTELLOY alloy B MONEL alloy 400 C70600 (90-10 Cupro-nickel) Copper Lead, chemical Aluminum 3003 Titanium
>7.62 >300
2.24
88
10.16 > 400
–
–
.03
1
<.03
<1
08
3
03
1
<.03
<1
>7.62 >300
2.11
83
10.16
400
–
–
Nil
Nil
<.03
<1
<.03
<1
<.03
<1
<.03
<1
–
–
3.00
118
–
–
–
–
Nil
Nil
Nil
Nil
13
5
–
–
<.03
<1
>7.62 >300
64
25
4.98
196
–
–
Nil
Nil
<.03
<1
Nil
Nil
–
–
<.03
<1
>7.62 > 300
–
–
4.57
180
–
–
–
–
03
1
20
8
<.03
<1
–
–
–
–
–
–
–
–
.89
35
–
–
–
–
–
–
<.03
<1
–
–
7.11
280
–
–
2.95
116
74
29
–
–
–
–
–
–
<.03
<1
–
–
1.35
53
–
–
74
29
25
10
–
–
–
–
–
–
–
–
–
–
>7.62 >300
2.54
100
2.64
104
–
–
.05
2
03
1
15
6
.20
8
> 7.62 > 300
–
–
–
–
–
–
1.14
45
–
–
–
–
–
–
–
–
–
–
6.09 240 >7.62 >300
6.35
250
2.95
116
1.17
46
.05
2
05
2
23
9
76 30 > 5.08 > 200
>7.62 > 300 – –
–
–
5.28
208
–
–
–
–
25
1 0
30
12
>7.62 >300 .86 34 .03 1 – –
–
–
10. 16 > 400 1.35 53 <.03 <1 – –
–
–
–
–
38
1 5
33
13
> 7.62 > 300 – – – – – –
–
–
–
–
13
5
.03
1
–
–
<.03
<1
<.03
<1
Zirconium Tantalum
–
–
<.03
<1
–
–
–
–
–
–
–
–
–
–
<.03
<1
–
–
–
–
–
–
–
–
*1 –Reactor liquid for 1600 hours at ca. 125 ºC (257 ºF). 2 –Reactor vapor line to condenser for 190 hours at ca. 130 ºC (266 ºF). 3A –Reactor vapor condenser top head for 1200 hours at ca. 130 ºC (266 ºF). 3B –Same as 3A during different period for 2600 hours. 4 5 6 7 8 –Condensate from exposure No. 3 at ca. 30 ºC (86 ºF) for 190 hours. –Bottom of extractor for 1600 hours at ca. 30 ºC (86 ºF). –Top of extractor for 1600 hours at ca. 30 ºC (86 ºF). –Base of crude acid stripping still for 4000 hours at 110 ºC (230 ºF). –Overhead liquid-vapor from exposure No. 7 (feed to acrylic acid refining still) for 3 days at 88 ºC (190 ºF) (air present).
TABLE XL
Corrosion of Alloys in Propylene Oxidation Process for Acrylic Acid
Corrosion Rate
1 mm/y mpy <.03 <1
2 mm/y mpy <.03 <1
3 mm/y mpy <.03 <1
4 mm/y mpy <.03 <1
5 mm/y mpy <.03 <1
6 mm/y mpy <.03 <1
7 mm/y mpy <.03 <1
8 mm/y mpy <.03 <1
9 mm/y mpy <.03 <1
10 mm/y mpy <.03 <1
11 mm/y mpy <.03 <1
12 mm/y mpy <.03 <1
Exposure*
Alloy
Type 304 Stainless Steel Type 316 Stainless Steel CARPENTER alloy 20 HASTELLOY alloy C
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
–
–
–
–
–
–
–
–
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
<.03 <1
–
–
–
–
–
<.03 <1
–
–
<.03 <1
–
–
–
–
<.03 <1
<.03 <1
INCONEL alloy 625 INCONEL alloy 600 MONEL alloy 400 Copper Nickel 200
–
–
–
–
–
–
–
–
–
–
<.03 <1
–
–
<.03 <1
–
–
–
–
<.03 <1
–
–
–
–
<.03 <1
<.03 <1
<.03 <1
–
–
<.03 <1
–
–
<.03 <1
–
–
–
–
<.03 <1
–
–
–
–
.25
10
.25
10
.03
1
–
–
–
–
–
–
–
–
–
–
–
–
.13
5
.48 19
– –
– –
.97 .28
38 11
.81 32 <.03 <1
.20 .03
8 1
.05 .05
2 2
– –
– –
– –
– –
– –
– –
.13
5 –
.08
3 –
.53
21
.91 36 – –
–
–
–
–
7–Acrolein oxidation converter at 220 º C (428 º F) for 220 days. 8– Oxidation reactor quench line at 80 º C (175 º F) for 220 days. 9–Solvent extraction column overhead at 42 º C (108 º F) for 8 days. 10–Water layer from solvent column separator at 35 º C (95 º F) for 330 days. 11–Solvent recovery column base at 105 º C (221 º F) for 110 days. 12–Recovery column for No. 10 above at 95 º C (203 º F) for 360 days.
* 1–Propylene oxidation converter at 400 º C (752 º F) for 180 days. 2–Quench line from converter at 110 º C (230 º F) for 300 days. 3– Scrubber circulating line at 85 º C (185 º F) for 31 days. 4–Acrolein stripper base at 140 º C (284 º F) for 300 days. 5– Crude acrolein separator pot at 25 º C (77 º F) for 180 days. 6– Acrolein refining still base at 105 º C (221 º F) for 20 days.
Page 37
Made with FlippingBook HTML5