Next, we will analyze how to distinguish the quality of zinc steel guardrail accessories.
1. Judging from the quality of appearance: The galvanized parts have a uniform and complete galvanized layer on the surface, with consistent color, practicality and smoothness on the surface. Poor quality guardrail accessories have various pinholes, pits, peeling, blistering, peeling, yin and yang surfaces, spots, burning, mist, and sponge like sedimentary layers.
2. The weight of the galvanized layer: Due to the galvanizing process, the galvanized layer of guardrail accessories cannot be completely uniform. Generally, two indicators are used to measure the galvanized amount: the average zinc adhesion M and the zinc adhesion Mmin. The average value of the galvanized amount is required to be not less than M, and the galvanized amount must be greater than Mmin. In layman's terms, it is the arithmetic mean of the specified number of measurements of the local thickness within the basic measurement surface* The minimum value of the local thickness measured on the main surface of a workpiece.
3. Adhesion of zinc layer on galvanized parts of guardrail accessories: The zinc layer is firmly bonded to the base metal, and the surface of the iron part reacts with the zinc solution to form a zinc iron alloy layer in a zinc bath at a certain temperature for a certain period of time.