The primary application of this test is for determination of relative resistance to gouging damage for pipe coatings that are intended to protect the steel during pulls through directional drilled holes or other physically demanding operations
It may be applied to primary corrosion coatings, such as FBE, multi-layer FBE, extruded polyolefins, liquid epoxies and coal tar enamel, as well as weld-area coatings like liquid epoxies, shrink sleeves, and tapes. The apparatus consists of a movable cart under a fixed point. The point can be loaded with weights to any desired level up to about 100 kilograms. Typically, the contact point for this test is a replaceable carbide burr with a 20-degree angle cone point terminating in a hemispherical tip. The specimen is placed on the cart and the cart is pulled at a rate of 25 centimeters per minute (10 inches per minute) under the loaded point. This apparatus uses an electric motor and a screw driver mechanism to move the cart.
Charter Coating’s Gouge Tester and setup showing pipe ring platform
4” x 4” (100 mm x 100 mm) one-side coated flat panels
4” x maximum OD of 4.5” (100 mm x max 115 mm OD) pipe coupons
Test temperatures range from -30 °C (-22 °F) to 50 °C (122 °F)
Typical loads are 30 kg and 50 kg
The contact point travels at a speed of 250 mm/min (10 in/min)
CSA Z245.20 Section 12.15
CSA Z245.21 Section 12.7
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