1. Strip, round bar material (material: copper, iron, aluminum) inspection standards:
A. Whether there are dents on the surface of the strip and the round bar, and the deformation weld is smooth.
B. Tape measure, caliper, thickness gauge to measure the length, diameter and thickness of the tape, round bar.
C. Visually cast iron, copper, aluminum material, iron, copper, aluminum only sound the difference between hard and soft.
2. Inspection standards for electroplating:
The surface is free of scratches, black and white, yellowing, whitening, peeling, etc., with the standard as the sign. Testing method:
A. The visual surface does not meet the sample and drawing standards.
B. Appropriate force strikes the electroplating product to see if it falls off.
3. Dimension inspection standard:
Use tape measure, caliper, micrometer, thickness gauge to measure the size required by the customer or the drawing. The actual measurement result is to see if it is within the size and tolerance required by the customer or the drawing.
4.Salt spray test standards:
A. Brine Preparation
The concentration of brine used in the test is 5% by mass. Therefore, the mass (weight) ratio of salt to water is 5:95, that is, five parts of salt to ninety-five parts of water.
Pay attention to the drying of the salt when preparing, otherwise it will affect the accuracy of the mass fraction. Strict requirements must pay attention to the water quality and pH value, and pay attention to electronic weighing when preparing. Pay attention to the weight and accuracy of the container.
B. Testing
Put the product in the salt spray machine and observe it every two hours and make a record.
C. Inspection standards
Different surface treatments have different corrosion resistance properties. The products used in different places have different standards from different customers, and the specific requirements of the customer shall prevail.