Aluminized zinc steel plate is a registered trademark of BIEC International Inc., which is one of BIEC’s world patents. Thirty-one steel mills in 22 countries around the world have obtained production technology and licenses from BIEC International to produce aluminum plated zinc plates with a surface coating of 55% aluminum zinc alloy.

Introduction

The cumulative global output of aluminum-plated zinc steel plate has reached 24 million tons since it entered the practical stage in 1972, and the annual output is about 3 million tons. 30 ~ 35% of the products of aluminized zinc steel plate are painted for the roof and walls of the building. In addition to being a trademark of BIEC, aluminized zinc steel plate is also registered and licensed by BIEC for the following products:CINCALUM ZALUTITE
ALGAFORT ZINC-ALUM
ALUZINC ZINCALIT
ALUZINK ZINCCALUME
CINCALUM ZINTRO-ALUM
GALVALUME
The surface of the aluminized zinc plate is characterized by smooth, flat and gorgeous star flowers, and the primary color is silver-white. The special coating structure makes it have excellent corrosion resistance. The normal service life of aluminized zinc plate can reach 25a, the heat resistance is very good, can be used in 315℃ high temperature environment; The adhesion between the coating and the paint film is good, and it has good processing properties, which can be pressed, cut, welding, etc. The surface conductivity is very good.
The composition of the coating is composed of 55% aluminum, 43.4% zinc and 1.6% silicon by weight ratio. The production process of aluminum-zinc plated steel plate is similar to that of galvanized steel plate and aluminum-plated plate in that it is a continuous melting plating process. The aluminum plated zinc steel plate with 55% aluminum zinc alloy coating has better corrosion resistance than the galvanized steel plate with the same thickness when both sides are exposed to the same environment. The aluminum plated zinc steel plate with 55% aluminum zinc alloy coating not only has good corrosion resistance, but also has excellent adhesion and flexibility.

Production process

Because the steel plate will be affected by moisture oxidation rust, it must be added on the surface of the anti-corrosion protective layer, the general use of anti-corrosion coating is divided into hot dip galvanized Zn and hot dip aluminum zinc alloy Al-Zn (aluminum zinc alloy composition of 55% aluminum, zinc 43.5% and silicon 1.5%, referred to as 55%Al-Zn). The data show that the comprehensive anti-corrosion ability of 55% aluminum zinc plating is 4 times that of the same thickness galvanized.
According to foreign experience specifications, the substrate anticorrosive coating of general molded steel plate (pit plate) should be no less than 350g/㎡(Z35) or 185g /㎡(AZ185) of hot dip galvanized aluminum plating.
The minimum hot-dip Zinc/Galvanizing specification for cold-rolled section steel and floor slab for building structure is 275 g/㎡(Z27), and the requirement for exposed coastal parts is 350g/㎡(Z35).

Peculiarity

1. Heat reflectivity:
   The thermal reflectivity of aluminized zinc steel plate is very high, which is twice that of galvanized steel plate, and people often use it as a thermal insulation material.
2. Heat resistance:
   Aluminum zinc alloy steel plate has good heat resistance, can withstand the high temperature of more than 300 degrees Celsius, and the resistance to high temperature oxidation of aluminum plated steel plate is very similar, often used in chimney tubes, ovens, illuminators and daylight lampshades. Corrosion resistance:
   The corrosion resistance of aluminized zinc steel coil is mainly due to the protective function of aluminum. When the zinc is worn, the aluminum forms a dense layer of alumina, preventing the corrosion resistance from further corroding the interior.
3. Economy:
   Because the density of 55%AL-Zn is smaller than that of Zn, the area of the aluminized zinc steel plate is more than 3% larger than that of the galvanized steel plate under the same weight and the same thickness of the gold plating layer.
4. Easy to paint
   There is excellent adhesion between the aluminized zinc plate and the paint, and it can be painted without pretreatment and weathering treatment.
   The coating adhesion of the gold-plated layer of aluminum-zinc plated steel plate is excellent, so it can also be directly coated on the advertising board and the general board without Weathering and other pretreatment.
5. Aluminized zinc steel plate has a silver-white gorgeous surface.
6. Aluminized zinc steel plate and galvanized steel plate have similar processing properties and spraying properties.

Product application

Buildings: Roofs, walls, garages, soundproof walls, pipes and modular houses
Automobile: muffler, exhaust pipe, wiper accessories, fuel tank, truck box, etc
Home appliances: refrigerator backboard, gas stove, air conditioner, electronic microwave oven, LCD frame, CRT explosion-proof belt, LED backlight, electric cabinet and other agricultural use: pig house, chicken house, granary, greenhouse pipes and so on
Other: heat insulation cover, heat exchanger, dryer, water heater, etc.

Distinction

The difference between galvanized plate and aluminized zinc plate:
The difference between galvanized plate and aluminized zinc plate mainly lies in the difference of coating, the surface of galvanized plate is evenly distributed with a layer of zinc material, which plays an anodic protection role on the base material, that is to say, the alternative corrosion of zinc material protects the use of the base material, and only when the zinc is all corroded can damage the base material inside.
The surface coating of the aluminized zinc plate is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. The surface of the aluminized zinc coating is a honeycomb structure at the microscopic level, and the “honeycomb” composed of aluminum contains zinc. In this case, although the aluminized zinc coating also plays the role of anode protection, But on the one hand due to the reduction of zinc content on the one hand because the zinc material is not easy to electrolyze by aluminum, the role of anode protection is greatly reduced, so once the aluminum plated zinc plate is cut, the edge of the cut is basically lost in the case of protection will soon rust, so the aluminum plated zinc plate should be cut as little as possible, once the cut after the application of anti-rust paint or zinc-rich paint to protect the edge, The service life of the plate can be extended long.