UT-X® Powder is a cost-effective couplant powder for flaw detection and thickness gaging applications where ferrous corrosion inhibition is required. UT-X Powder retains viscosity on salt caked boiler tubes, corroded pipe, structural steel, steel billets, welds and ship plate. Mixed with water at the inspection site, its compact and lightweight packets are easy to transport to a job site or to store as an emergency couplant for unanticipated shortages.
UT-X® Powder is available in the following sizes:
| Appearance: | Granular Powder |
| Color: | White |
| Comparative Viscosity: | 1 to 7 |
| Actual Viscosity: | Variable by altering water amount |
| Long Velocity: | 1.51 cm/sec |
| Impedance: | 1.53 Mrayls |
| Acoustic Performance: | 40 |
| Silicone: | No |
| Glycerin: | No |
| Propylene Glycol: | No |
| Water Soluble: | Yes |
| Halogens: | N/A |
| Sulfur: | N/A |
| Temperature Range‡: | 32° to 120°F (-0° to 49°C) |
| Storage Temperature: | 50° to 86°F (10° to 30°C) |
| Compatibility: | Most composite and metals |
‡ Couplant integrity and acoustic performance may decline beyond these temperature limits.
Can be winterized to -20°F (-29°C) by replacing 20% of the water used for preparation with propylene glycol.
When mixing, be very careful to avoid adding air bubbles to the water/couplant. Use the chart below and measure water into a clean mixing container. Let water sit to remove excess air (four hours is optimum). Slowly mix packet A into water until dissolved. Mix by stirring by hand or use a drill mixer. Add packet B and continue mixing until couplant thickens, this may take several minutes.
| Viscosity | Water |
| Low (2-3) | 1.75 gal. (6.6 L) |
| Medium (5) | 1.25 gal. (4.7 L) |
| High (6-7) | 1 gal. (3.8 L) |
| Very High (8) | 0.75 gal. (2.8 L) |
Apply a small amount of couplant to the transducer or inspection area before measurement.
Remove couplant immediately after inspection before the couplant dries with water rinse or a combination of water rinse and brushing. A difficult-to-remove film may form if the couplant is allowed to dry before removal. Remove film by pressure washing, wire brushing or immersing the part in water until the couplant rehydrates and can be washed or brushed off.
Store prepared couplant in an airtight container. Store out of direct sunlight. Keep container closed when not in use. Never put unused couplant back into the storage container.