As a key piece of equipment for anti-corrosion coating testing, the cathodic stripping machine's operating experience directly impacts the accuracy of test results and the lifespan of the equipment. Through long-term practice, we have summarized the following key points.
Equipment commissioning and parameter control are fundamental. Before startup, the peel force sensor must be strictly calibrated to ensure that the measuring range matches the coating being tested (typically 5-50 N/cm). Temperature control is particularly critical. Epoxy powder coating peel tests often require a constant temperature of 150 ± 5°C. Excessive deviation will result in uneven softening of the coating. Hydraulic system pressure adjustment should follow the "step-by-step pressurization" principle, with the initial pressure set at 70% of the estimated peel force and then gradually adjusted to avoid impact damage to the sample fixture.
Sample preparation directly impacts test reliability. Steel pipe surface pretreatment must meet Sa2.5 rust removal standards, and the curing time of the primer and topcoat must strictly comply with material specifications. Common errors include uneven coating thickness or unrefined edges. It's recommended to use a thickness gauge to inspect the specimen at multiple points (at least three points per 10 cm²) and to sand the specimen edges with fine sandpaper.
Detailed management of the operational process is equally important. During the peeling process, maintain a constant rotation speed (recommended linear speed of 0.5-1 m/min) and observe the peeling interface for delamination or brittle fracture. Abnormal vibration may indicate insufficient fixture alignment and require shutdown and re-fixing. After the test, remove any residual adhesive promptly to prevent corrosion of hydraulic components.
In long-term use, regular maintenance has been found to significantly improve equipment stability. Check the ball screw lubrication monthly, replace the seals quarterly, and verify system accuracy using standard test blocks. Mastering these practices can effectively control test errors to within ±3%, extending the equipment's service life to over eight years.
