Development and opportunities of China's Hot-dip galvanizing Industry under the New situation [Hot-dip galvanizing Development Forum]

SMM Sept. 14: at the fourth China International Hot Dip galvanizing Technology and Market Application Development Forum 2021 held by (SMM) of Shanghai Nonferrous net Information Technology Co., Ltd., Zhang Qifu, president of Asia Pacific galvanizing Association and chairman of the Hot Dip Professional Committee of China corrosion and Protection Society, made a professional analysis on "the development and opportunities of China's hot dip galvanizing industry under the new situation".

The present situation and Challenge of China's Hot-dip galvanizing Industry under the New situation

At present, there are more than 600 continuous galvanizing lines in China, with a total production capacity of more than 110 million tons. In 2020, China's hot-dip galvanized products used a total of 3.9 million tons of zinc, accounting for about 60% of the 6.54 million tons of zinc consumption.

Development trend of hot-dip galvanizing industry:

1. The process is green.

A new type of green coating product-continuous PVD of steel strip

Hot dip plating-limited to tin, zinc, aluminum and other low melting point metals or alloys.

Electroplating is limited to non-passive metals such as copper, nickel, chromium, zinc and so on.

Continuous coating-limited to organic coatings, there is "three wastes" pollution.

PVD vacuum coating-substrate and coating are unlimited and theoretically omnipotent.

Development of high corrosion resistance, composite functional coating: using continuous PVD coating, we can realize the deposition of composite high corrosion resistance, high wear resistance and composite functional coating, and develop "Only One" personalized products, which can meet the various and flexible needs of users, which will greatly change the habits and sanitary processes of existing iron and steel products.

The means to solve the problem of zinc plating on ultra-high strength steel: continuous PVDPVD coating technology provides a new idea and new process for solving the contradiction between composition and dipping mechanism, heat treatment process and mechanical properties of multiphase steel such as high strength and ultra-high strength.

2. Intelligent manufacturing

Equipment automation in galvanizing industry

1 integrated control of production process

(2) coordinate and optimize all levels of production and improve production efficiency.

3 quality stability, reliability and applicability of galvanized products

(4) the control of product shape and dimension accuracy, microstructure, properties and surface quality.

5Personalization and customization of products under mass customization

6 equipment condition diagnosis, prediction and intelligent self-healing control

7 Intelligent control and optimization coordination of logistics and energy

3. High-end products

High strength coated automobile steel

The main large iron and steel enterprises in China already have the ability to produce GI products below 980MPa, and DP steel, CP steel and TRIP steel can supply GI products. GA products of corresponding steel grades are also wholesale.

4. Supply service

EVI service

EVI and CMF: provide customers with higher-performance materials and personalized services: provide customers with higher-performance materials and personalized services. In today's more and more homogeneous products, the pursuit of differential competition is the key for enterprises to get out of the low-level homogeneity.

The EVI service is a cooperation mode adopted by steel mills, automobile and household appliance factories at present.

In order to reduce user process and user cost, functional steel plates for different uses are produced through online centralized processing, and users are provided with "ready-to-use" products.

The spray-free steel for household appliances and the pre-coated plates of household appliances have increased greatly.

5. Market diversification

Considering that China is a developing country, housing and cars will continue to upgrade and after years of large-scale construction, China has greatly increased the total amount of basic construction, but taking into account the huge population base, vast land area and the actual needs of a catch-up economy, infrastructure construction is still inadequate and infrastructure investment has become a means of policy regulation and control of the economy to a certain extent. Under the background of the stimulation of new infrastructure under the epidemic this year, the market demand for hot-dip galvanizing is expected to continue to increase in the future.

Galvanized products have also opened up new markets, including steel building structures, steel bridges, steel bars, building plate buckle scaffolding, solar engineering, as well as steel underground pipe corridors and sponge cities.

In the continuous development, the variety of hot-dip galvanizing industry is also more abundant, in the aspect of continuous galvanizing, the addition of GI, GA, GL, ZM, AS and other elements is added.

In the aspect of batch galvanizing, hot-dip galvanizing, zinc-nickel alloy, Galfan and so on are added; in terms of functional coating, self-lubrication, fingerprint resistance, self-cleaning, printing board, pressing plate, coating plate and so on are added.

The substitution of new products

Zinc-aluminum-magnesium coated steel plate is used to replace batch galvanized products such as highway guardrail.

Generally speaking, China's iron and steel industry is currently in the process of structural adjustment, while ushering in a new development trend of intelligence and greening. for the better development of the industry, collaborative innovation of upstream and downstream production chains is needed.

In the face of the new international situation and the impact of the crown epidemic, the market of coating products is under certain pressure, but with the national policy adjustment, such as the stimulation of new infrastructure and the development of the field of coating products, there are still great opportunities for the development of iron and steel coating industry.

With the development of the iron and steel industry, the coated laminate is also facing a new situation, which requires great technological innovation to achieve green production, intelligent manufacturing, high-end products, service supply and market diversification in the coating field.