AIYIA-Quality Defects and Precautions of Galvanized Sheet
We use cookies to improve your online experience. By continuing browsing this website, we assume you agree our use of cookies.

Quality Defects and Precautions of Galvanized Sheet

Views : 722
Update time : 2022-12-20 10:34:09
Quality Defects and Precautions of Galvanized Sheet
Common quality defects of galvanized sheet
Defect name Defect performance Cause
Galvanized peeling Dezincification Poor furnace temperature, improper substrate processing, etc.
Not galvanized Part of the steel plate surface is not galvanized poor raw materials, poor pre-treatment degreasing, poor furnace temperature
Bad spangle Uneven spangle size, no spangle Poor heating in the furnace area and poor cooling control
Zinc scar Point and granular zinc dross attached to the surface of the steel plate The scum or bottom dross in the zinc pot adheres to the steel belt
Oxidation White rust During storage, it absorbs moisture in the air and oxidizes.
2Zn+O2 → 2ZnO
5ZnO+2CO2+3H2O
→2ZnCO3·3Zn(OH)2
Dark Spot Black dots, blocky spots Impurity precipitation reacts with moisture and carbon dioxide in the atmosphere, or friction during transportation.
Wave Wavy edges or middle Poor raw material or poor working condition of the pull-straightening roller.
Jagged edge Jagged edges When the raw material is cold rolled, the edges are uneven and jagged.
Uneven surface Dent Pits in the raw material or adhesion of foreign matter on the surface of the roller

Matters needing attention in the transportation and storage of galvanized coils

1.Choose a ventilated place in the house to avoid dew erosion or moisture penetration;
2.Make sure that the packaging paper is not damaged during storage;
3.Shorten the storage time as much as possible and protect its surface before corrosion;
4.If the plate is subjected to abnormal external pressure, the zinc layer will partly fall off;
5.Prevent dirt and oil powder from sticking to the surface, which will affect the galvanizing effect;
6.Skids or support frames should be added under the steel coils, and the number of stacked layers should not exceed two;
7.The rain cloth should be covered during transportation, and it must be cushioned with skids and rubber, and fixed with ropes.

Related News
Read More >>
Technological Innovations in Synthetic Resin Roofing Production Technological Innovations in Synthetic Resin Roofing Production
Dec .12.2023
When it comes to roofing materials, resilience and durability are key considerations. One of the latest breakthroughs in the production of roofing materials is the use of synthetic resin.
Design Trends in Roofing: The Rise of Synthetic Resin Design Trends in Roofing: The Rise of Synthetic Resin
Dec .12.2023
Roofing may seem like a straightforward aspect of a building's design and construction. However, it plays a pivotal role in the building's overall aesthetics and functionality.
Integrating Renewable Energy with Synthetic Resin Roofing Sheets Integrating Renewable Energy with Synthetic Resin Roofing Sheets
Dec .05.2023
The demand for energy-efficient and environmentally friendly solutions is rapidly increasing across the globe. With the growing concern for climate change, there is an urgent need to shift towards renewable energy sources. One industry that has been actively contributing to sustainable practices is the roofing industry. In this blog post, we will explore the integration of renewable energy sources with synthetic resin roofing sheets, and how this combination can lead to eco-friendly and cost-efficient roofing solutions.
Advancements in Synthetic Resin Roofing: Durability Meets Style Advancements in Synthetic Resin Roofing: Durability Meets Style
Dec .05.2023
The world of roofing has come a long way in the past few decades. What was once thought of as a purely functional component of a home has now become an essential aspect of its aesthetic design. From traditional shingled roofs to modern metal, glass, and even living roofs, there’s no shortage of options for homeowners looking to create a unique look for their homes. One of the most innovative materials on the market today is synthetic resin roofing, which offers a perfect balance between durability and style. In this blog, we’ll explore the advancements in synthetic resin roofing technology, its innovative features, the environmental benefits of using it, and some successful implementations worldwide.