Preparation
Tensile forces are transferred from the carbon fibre plate through the adhesive into the bearing substrate. The substrate should therefore have an inherent surface tensile strength greater than 1.5 N/mm2. Testing of the tensile strength of the substrate should be carried out prior to application of carbon fibre plate by a bond test.
The surface of the substrate must be roughened by grinding or sandblasting to remove any weak surface laitance or deleterious friable material. In order to prevent peeling due to deviation forces, the evenness of the prepared surface must be tested with a 2m straight edge. Maximum allowable deviation is 5mm over a 2m length.
If the substrate is uneven, then it will need to be re-profiled using webertec EP structural adhesive. If the substrate is poor and the tensile bond strength is less than 1.5 N/mm2, the surface may need to be primed. Please contact Technical Services for recommendations.
Immediately prior to the application of webertec EP structural adhesive, solvent wipe the carbon fibre plate with webertec solvent to remove carbon dust and any contaminants. Wait until surface is dry before applying adhesive.
