| Protecto 401 vs. Polyethylene
|
|
|
TEST
|
PROTECTO 401 RESULTS
|
POLYETHYLENE RESULTS
|
|
1. 160°F DISTILLED
WATER IMMERSION
scribed panels
Rated using ASTM
D-714-87
|
24 months, slight red
rust in scribe, no
undercutting.
|
1-1/2 months, delamination
of film, test terminated.
|
|
2. 120°F TAP WATER
IMMERSION
scribed panels
Rated Using ASTM
D-714-87
|
24 months, slight red rust
in scribe, no undercutting.
|
6 months, film curls
back l/2" from scribe,
test terminated.
|
|
3. 140°F 25% SODIUM
HYDROXIDE
IMMERSION
Rated Using ASTM
D-714-87
|
24 months, no effect.
|
1-1/2 months, delamination
of film, test terminated.
unscribed
|
|
4. SALT SPRAY
ASTM B-117
scribed panels
|
24 months, red rust in scribe,
no undercutting.
|
1-1/2 months, l-1/2" under-
cutting at scribe. Test
terminated
|
|
Note: All materials were tested with an average film thickness of 40 mils on production-run ductile iron pipe.
|
