High-Quality GL Steel Coil, 55% Zinc-Aluminum Coated Metal Sheet, Galvalume Steel Coil For Sale

Galvalume Color Coated Steel Coil Product

High Corrosion Resistance & Long-term Protection · Factory Direct Supply

Product Overview

55% Galvalume color coated steel coil is a high-end composite material, which takes 55% Al-Zn alloy coated steel sheet as the base material, and compounds organic coating through continuous roller coating process after surface pretreatment. It perfectly combines the super anti-corrosion ability of galvalume substrate with the decoration and weather resistance of organic coating, solving the pain points of traditional steel such as easy rusting, high maintenance cost and on-site painting pollution, providing a long-term, beautiful and low-cost full-life cycle solution for construction, home appliances, industrial and other fields.

Core Product Advantages

 2-6 Times Super Corrosion Resistance

The galvalume coating (55% Aluminum, 43.4% Zinc, 1.6% Silicon) forms a dual protection system:

Aluminum element forms a dense alumina passivation film, blocking the penetration of water vapor and corrosive media

Zinc element provides sacrificial anode protection, which can independently protect the scratched/incision area and avoid the spread of corrosion

Salt spray resistance reaches 800-1500 hours, 2-3 times that of ordinary galvanized color steel

The outdoor service life is up to 15-25 years, far exceeding traditional materials

☀️ Long-term Weather Resistance & Energy Saving

Dual protection of organic coating + galvalume substrate, strong UV weather resistance, stable color without fading for a long time

The thermal reflectivity of galvalume layer exceeds 0.75, twice that of galvanized sheet. As a roof panel, it can effectively reduce indoor temperature and air conditioning energy consumption

It can withstand high temperature of 490℃ without oxidation or peeling, suitable for high-temperature industrial scenarios

 Excellent Formability

It can be bent, rolled and stamped into various complex shapes, without cracking or peeling of coating and plating

Perfectly adapt to complex processing requirements such as building envelope and home appliance parts, with convenient installation and high construction efficiency

 Green Environmental Protection & Cost Optimization

100% recyclable steel, complying with RoHS & REACH environmental protection standards, no heavy metal pollution

Extremely low later maintenance cost, the full life cycle project cost is reduced by more than 30% compared with traditional materials

Quick installation, greatly shortening the project period

Technical Specifications

Wide Application Scenarios

 Building & Construction

Factory roofing, wall cladding, curtain walls, canopies

Prefabricated modular houses, prefab houses

Especially suitable for projects in coastal high salt spray and industrial high corrosion areas

Galvalume color steel roof panels to be installed, providing long-term protection for buildings

 Home Appliances

Refrigerator shells, air conditioner panels, washing machine cabinets

Freezer, water heater and other home appliance shell parts

 Industrial & Transportation

Logistics containers, wagon interiors

Grain silos, ventilation ducts, greenhouse structure

 Advertising & Decoration

Billboards, highway guardrails

Interior partition boards, shutter doors, decorative panels

Strict Production Process

Substrate Pretreatment
Degreasing to remove residual surface oil → Phosphating to form compact phosphate conversion film → Passivation treatment to enhance coating adhesion and corrosion resistance

Multi-layer Roller Coating
Adopting continuous coil coating process, first apply epoxy primer for base protection, then topcoat for color and weather resistance, and back paint for reverse side protection

High-temperature Curing
Curing in a continuous baking oven at 200-240℃ to form a stable cross-linked network structure, ensuring coating adhesion and durability

Full Inspection Quality Control
Full inspection of coating uniformity, color difference, physical properties and salt spray corrosion resistance to ensure products meet international standards

Packaging & Delivery

Authoritative Qualification Certification

ISO 9001 Quality Management System Certification

CE EU Safety Certification

SGS/BV Third-party Authority Test Report

RoHS & REACH Environmental Compliance Certification

Customized Service Support

We can provide full-dimensional customization according to your needs:
✅ Color Customization: Support full color matching of RAL & Pantone
✅ Size Customization: Thickness and width can be adjusted on demand, support cutting
✅ Coating Customization: Match different coatings such as PE and PVDF according to application scenarios
✅ Solution Customization: Provide professional technical solutions for different application scenarios
✅ Free Sample: Free samples available, freight collect (freight can be refunded after cooperation)

FAQ

Q: Can you guarantee on-time delivery?
A: Integrity is our core tenet. No matter how the market price fluctuates, we will guarantee the delivery of qualified products on time.

Q: How can I get the quotation quickly?
A: You can provide the order demand, product specifications (steel type, size) and destination port, we will provide you with the latest quotation within 24 hours.

Q: How to get the sample?
A: We can provide free samples, the sample freight is borne by the customer; if the cooperation is reached subsequently, the freight can be borne by our company.

Q: What is the minimum order quantity?
A: The MOQ of conventional products is 5 tons, which can be negotiated and adjusted for trial orders, which can be confirmed according to product details.