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What roles the galvanized steel tape plays in mechanical protection and magnetic shielding

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What roles the galvanized steel tape plays in mechanical protection and magnetic shielding

March 26
17:34 2021

1. Introduction

The galvanized steel tape is generally made of cold-rolled steel tape through electric (hot) plating to obtain a certain thickness of zinc layer, so it has good corrosion resistance. The main purpose of galvanizing the cold-rolled

the steel tape is to further improve the corrosion resistance of the cable armored steel tape

One world company is willing to provide customers with steel belts for armored cables with special requirements to meet the economic benefits of customers.

One world company’s standard is: ASTM A459

2. Parameters

Nominal thickness

(mm)

Tensile strength

(N/mm2)

Breaking elongation

(%)

Weight of zinc coating

(g/m2)

Class I

Class II

Class III

0.20

≥295

≥17

≥110

≥210

≥300

0.30

≥295

≥20

0.50

≥295

≥20

0.80

≥295

≥20

Note: The length and width of galvanized steel tape for armoring can be provided according to customers’requirements; in addition to the specifications in the sheet, galvanized steel tapes with other thickness and zinc content can also be provided according to customers’requirements.

3. Suitable cables

It is suitable for control cables, power cables, etc.

4. Relative equipment

Steel tape armoring machine is necessary equipment for cabled power cables and control cables in wire and cable factories. Mainly used for cable steel tape armoring.

5. What is the production technology of galvanized steel tape?

The production technology of galvanized steel tape is mainly divided into two types: Hot-dip (R) and electroplating (D).
Electro-galvanization: It is the process of using electrolysis to form a uniform, dense, and well-bonded metal or alloy deposit on the surface of the part.

Hot-dip galvanized steel tape is a product made by continuous hot-dip galvanizing of steel. It has high precision, smooth surface and a wider range of applications. Sendzimir method, modified Sendzimir method and American Steel Union method are three commonly used hot-dip galvanized steel tape processing methods.

The following is the continuous hot-dip galvanized steel tape production process:

Coiling-uncoiling-cutting head and tail-welding-cleaning, degreasing-annealing-hot-dip galvanizing-air cooling-water cooling-squeezing, drying-smoothing-drawing straightening-passivation treatment-oiling-cutting welds, separation Cut tape and roll-take up-weigh-pack.

6. What are the properties of the coating?

1. Forming properties: Pure zinc has good plasticity and toughness, so pure zinc coatings have good forming properties.
2. Corrosion resistance: The corrosion of steel can be divided into chemical corrosion and electrochemical corrosion. The galvanized steel is covered by a zinc layer, which cuts off the contact between the steel surface and the environment, and reduces the chemical corrosion between the steel and the environment.
3. Welding performance

7. For galvanized steel tapes you may be concerned about:

1. Substrate type. The substrates of continuous hot-dip galvanized steel tapes include cold-rolled substrates and hot-rolled substrates.

2. Surface structure. According to the surface structure, the continuous hot-dip galvanized steel tape has normal spangles, large spangles, small spangles, no spangles and no spangles + smoothing. Normal spangles are suitable for civil use and ordinary constructions that do not require further painting; large spangles are based on zinc-free spangles by adding lead, antimony and other elements, adding lead for spangle protrusions, adding antimony for printing, large spangles It is popular in Southeast Asia because of its beautiful surface, but in developed countries, because lead and antimony are toxic substances, large spangles are no longer used; small spangles are of lower quality; zinc-free + smooth continuous hot-dip galvanized steel tape, It is suitable for the substrates of home appliance boards, automobile boards and color coated steel tapes with high surface condition requirements.

3. Zinc layer weight. The weight of the zinc layer directly determines the corrosion resistance of the steel tape, and the corrosion resistance of the steel tape increases with the increase of the weight of the zinc layer. At the same time, the price of the steel tape increases with the weight of the zinc layer.

4. Surface treatment. Continuous hot-dip galvanized steel tape has passivation, oiling, passivation + oiling and no treatment according to the surface treatment methods. Hot-dip galvanized steel tape is oxidized for a long time, and white rust will appear on the surface of the steel tape. Therefore, it is necessary to adopt passivation for the purpose of preventing rust. In addition to smoothing the surface, as a rule, the manufacturer treats other types of galvanized layers All are passivated. After the passivation treatment, oiling the steel tape will further reduce the corrosion under humid storage conditions.

5. Surface quality. The continuous hot-dip galvanized steel tape of the cold-rolled substrate is divided into three levels: ordinary, higher, and advanced according to the surface quality. The ordinary surface is allowed to have small corrosion spots, uneven zinc spots, slight scratches and indentations. Air knife tapes, small passivation spots, etc., can have stretch straightening marks and zinc flow marks; higher-level surfaces must not have corrosion points, but slight imperfect surfaces are allowed, such as stretch straightening marks, smoothing and pressing Marks, scratches, embossing, zinc patterns, zinc flow lines, slight passivation defects, etc.; high-grade surfaces must not adversely affect the uniform appearance of the high-quality paint layer.

Media Contact
Company Name: ONE WORLD CABLE MATERIALS CO., LTD.
Email: Send Email
Phone: 0086-15162145573
Country: China
Website: https://www.owcable.com/