Jiang Shiming: present situation and Development trend of Hot galvanizing Industry in China

Hot dip galvanizing is a kind of technology to dip steel, stainless steel, cast iron and other metals into molten liquid metal or alloy to obtain coating. It is the most widely used steel surface treatment method with the best ratio of performance to price in the world. Hot-dip galvanized products play an inestimable and irreplaceable role in reducing corrosion and prolonging life and saving energy and materials of iron and steel. at the same time, coated steel is also a high value-added short-term product that the country supports and gives priority to the development of high value-added short-term products. At present, China's hot-dip galvanizing industry has entered a new stage of high-speed and sustainable development. At the 2019 (14th) Shanghai lead and Zinc Summit hosted by Shanghai Nonferrous Network, Jiang Shiming, deputy director of the National Engineering Laboratory of Advanced Metal Materials plating and deputy general manager of Beijing Gangyan Xinye Design Engineering Co., Ltd., analyzes the current situation and development trend of hot-dip galvanizing industry in China from many angles.

The position of galvanizing in Zinc Industry

Galvanizing includes hot dip galvanizing, hot spray galvanizing, hot dipping galvanizing, mechanical galvanizing, zinc rich coating and so on. Among all kinds of galvanizing processes, hot dip galvanizing has the largest output and application amount, accounting for more than 85%.

Structure and scale of galvanizing Industry in China

Galvanized products in China are mainly used in infrastructure (roads, railways, power facilities, communication towers, municipal facilities), construction, automotive, household appliances, mechanical and electrical, agriculture and forestry, light industry and so on.

Present situation of continuous galvanizing in China

China's steel plate continuous hot-dip galvanizing started from 13 lines in 2000 with a production capacity of 2.3 million tons. By the end of 2018, more than 640 hot-dip galvanized steel production lines had been built in China, with a production capacity of more than 100 million tons. The galvanizing capacity has reached the level of 10 to 15% of crude steel in developed countries.

Problems in continuous plating Industry

The increase in demand has led to the rapid release of production capacity. In recent years, although the output, product quality, technology and equipment level of galvanized steel plate have been greatly improved, there are still many problems in steel plate, which are mainly reflected in:

The level of equipment is different, and there are many units with low production capacity.

Excess production capacity, the overall operating rate is insufficient, the waste of high configuration units is serious;

The private enterprises do not produce according to the standard, the thickness of the coating is on the low side, and the resources are wasted.

High quality, functional automotive home appliance board, high corrosion resistance building coating steel plate is imported in large quantities.

Problems in batch plating Industry

2. Serious overcapacity

3. Low degree of automation

4. The quality and technical level of some manufacturers is low.

5. Environmental protection measures need to be greatly improved

Challenges and opportunities for the Development of Hot galvanizing Industry

Environmental challenges of galvanizing Industry in China

Factors restricting the Development of galvanizing Industry in China

1. Environment, resource constraints

2. The growth rate of domestic demand is declining, and exports are limited.

3. Serious overcapacity and low concentration

4. Rising costs

Galvanizing opportunity: irreplaceable

1. Galvanizing is by far the most economical and effective protective measure for iron and steel!

2. Galvanized industry, like solar energy and new energy vehicles, is a green industry.

3. Demand still exists

Development trend of Hot galvanizing

Development trend of continuous galvanizing

In the high-grade construction, home appliances, automobile and other user industries, the quality requirements of galvanized sheet in addition to safety, durability, aesthetics, functionality and environmental protection have received more and more attention.

Development Direction of batch galvanizing Industry

1. Improve the environment and clean production

2. Improve the degree of automation

3. Improve quality and reduce costs

4. Open up the market of product application

Finally, he mentioned that after years of rapid growth, China's galvanizing industry is facing problems such as environmental constraints, overcapacity, slowing domestic demand growth, export restrictions and rising costs, and the development of galvanizing industry will slow down. In the future, some of the low-end galvanizing capacity with unqualified environmental protection and uncompetitive products will be eliminated by market competition, and the production capacity will be transferred and concentrated to the dominant enterprises. The technological progress of galvanizing industry will expand the scale of galvanizing industry and the scope of product application, but on the whole, it is developing in the direction of saving zinc resources. With the development of some new application fields of galvanized products, there are still great opportunities for the development of galvanizing industry, and will promote the common development of zinc industry.