Galv sheet metal, usually refers to galvanized steel sheet, and its quality control is a complex process involving multiple links and parameters. The following is a detailed analysis of quality control for galv sheet metals:

1、 Raw material quality control

High quality cold-rolled carbon steel should be selected as the substrate to ensure that the steel plate has good mechanical properties and chemical stability. Strictly inspect raw materials, including chemical composition analysis, mechanical property testing, etc., to ensure that the quality of raw materials meets production requirements.

2、 Production process control

1. Pre treatment: The steel plate is subjected to degreasing, acid washing and other pre treatments to remove impurities such as oil stains and oxide layers on the surface of the steel plate, ensuring the adhesion between the galvanized layer and the steel plate substrate.

2. Galvanizing process:
(1) Hot dip galvanizing: Control parameters such as temperature and immersion time of the galvanizing tank to ensure a uniform and dense galvanized layer. Meanwhile, pay attention to preventing the occurrence of defects such as zinc nodules and zinc spikes.
(2) Electrogalvanizing: Control the composition of the plating solution, current density, plating time, and other parameters to obtain the desired thickness and appearance quality of the galvanized layer.

(3) Post treatment: Cooling and passivation treatment are carried out on galvanized steel plates to improve the corrosion resistance and aesthetics of the galvanized layer.

3、 Quality Inspection Standards

The galvanized layer should be uniform, smooth, free of cracks, bubbles, peeling and other defects. At the same time, the cutting edge should be neat and free of burrs. Use appropriate measuring tools to measure the thickness of the galvanized layer to ensure that it meets the standard requirements. Perform chemical composition analysis on the galvanized layer to ensure that the zinc content meets relevant standards. Conduct mechanical performance tests such as tensile and bending tests to ensure that galv sheet metals have good mechanical properties.

4、 Packaging and Storage Quality Control

Galv sheet metals should be packaged with moisture-proof paper, plastic film and other materials for interlayer packaging to prevent friction damage and corrosion between steel plates. At the same time, the packaging should be firm, reliable, and easy to transport and store. Galv sheet metals should be stored in a dry and well ventilated warehouse, avoiding contact with damp and corrosive substances. At the same time, storage conditions should be regularly checked to ensure that the quality of steel plates is not affected.

5、 Quality Control System

Enterprises should establish a sound quality management system, including quality control measures for various links such as raw material procurement, production and processing, quality inspection, packaging and storage. Regularly provide quality awareness and skill training to production personnel to improve their quality awareness and operational skills. By collecting customer feedback, conducting internal audits, and other methods, we continuously identify and improve quality issues to enhance product quality and customer satisfaction.
In summary, the quality control of galv sheet metal is a complex process involving multiple links and parameters. Only by strictly controlling the quality of raw materials, production process parameters, quality inspection standards, and packaging and storage conditions can we ensure that the quality of Galv sheet metals meets relevant standards and customer needs.