MR® 757 One-Pack Ultrasonic Testing Coupling Powder Low to Very High Viscosity
MR® 757One-Pack Ultrasonic Testing Coupling PowderLow to Very High Viscosity
MR®757 is a cost-effective couplant powder which can be mixed with water for a ready-to-use coupling gel providing strong, continuous, even film that adheres very well to vertical and overhead surfaces and is compatible with all metals and any kind of surfaces. It comes in compact, lightweight packets and are easy to carry and use.
- Acoustically exact on vertical, horizontal and over-head surfaces
- Self and quick de-aeration
- Excellent coupling properties on smooth to rough surfaces
- Excellent consistency of gel upto 70 C. Best-in-class corrosion protection
- Blue tracer dye for homogenous mixing
Additional information
| Properties | Appearance – Free flowing powder Chemical Composition – Mixture of thickening agent; corrosion inhibitor; wetting agent and anti-foam emulsion Basis – Proprietary Odour – Odourless |
| Approvals | DIN EN ISO 25493 ASME BPVC (T-533) FAA-AC #25-29 (Glycerin free) AWS API |
| Recommended Usage | NDT Method – Ultrasonic Testing Type – II Method – C Sensitivity – 2 Compatibility – MR70I Area Coverage ~ 5 sq m (400ml nett Aerosol can) ; ~ 19 sq m (1 L) Usage Temperature – +0°C to +75°C / 32°F to 167°F Storage Temperature – 41°F to 113°F / +5 °C to +45 °C |
| Gel Preparation | Mix MR®757 in an appropriate quantity (or follow the chart below) with water and mix until the particles are dissolved and mixture thickens (5-6 minutes is optimum). Allow the couplant to stand until a working viscosity is formed. While mixing avoid adding air bubbles to the water / couplant. Using warm water (100°F / 38°C) to prepare the suspension will help the product mix faster.
§ Subjective measure 0-10 scale where 0 = water 5 =medium gel 10 = very thick paste |