Listed below are some of the strong oxidizing agents and oxidizing acids known or expected to attack and degrade polyphenylene sulfide. We generally do not recommend using Ryton® PPS in extensive service with these chemicals. However, service in the presence of many of these chemicals under relatively mild conditions may be acceptable. For example, Ryton® PPS can withstand common disinfectant solutions that contain low concentrations of some these chemicals (such as hydrogen peroxide, sodium hypochlorite, or chlorine). Tests and field service experience have also shown that Ryton® PPS can withstand the small quantities of nitric acid and other acids present in flue gases.
Nitric Acid
Chromic Acid
Chlorosulfonic Acid
Sodium Hypochlorite
Hydrogen Peroxide
Potassium Permanganate
Potassium Bichromate
Sodium Bichromate
Ozone |
|
Hydrochloric Acid
Hydrobromic Acid
Hydrofluoric Acid
Chlorine
Bromine
Iodine
Nitrogen Tetroxide
Peroxyacetic Acid
Peroxybenzoic Acid |
| Effects of Oxidizing Chemicals on Ryton® R-4 |
|
Chemical
Exposure Conditions |
Tensile
Strength
Retained |
Weight
Change |
| 37% Hydrochloric Acid |
|
|
| 24 hours, 200°F (93°C) |
61% |
+1.5% |
| 3 months, 200°F (93°C) |
35% |
-10.2% |
| 12 months, 200°F (93°C) |
27% |
-0.7% |
| 10% Nitric Acid |
|
|
| 24 hours, 200°F (93°C) |
91% |
0.0% |
| 3 months, 200°F (93°C) |
0% |
---- |
| Ozone, 1.35 ppm |
|
|
| 4 weeks, 208°F (98°C) |
93% |
|
| 5.25% Sodium Hypochlorite |
|
|
| 24 hours, 200°F (93°C) |
94% |
-1.2% |
| 3 months, 200°F (93°C) |
77% |
+0.4% |
| 12 months, 200°F (93°C) |
61% |
+0.3% |
|
Chemical
Exposure Conditions |
Flexural
Strength
Retained |
Weight
Change |
| 1.5% Bromine |
|
|
| 1 month, 180°F (82°C) |
75% |
|
| 2 months, 180°F (82°C) |
60% |
-3.1% |
| 3.3% Bromine |
|
|
| 1 month, 73°F (23°C) |
62% |
|
| 3 months, 73°F (23°C) |
36% |
-0.8% |
| 0.26% Chlorine |
|
|
| 1 month, 180°F (82°C) |
85% |
|
| 3 months, 180°F (82°C) |
78% |
-1.5% |
| 0.7% Chlorine |
|
|
| 1 month, 73°F (23°C) |
97% |
|
| 3 months, 73°F (23°C) |
99% |
+1.4% | |
|
|
|
|
|
