Analysis of Application Standards for Shandong Color Coated Plate in Various Industries
1、 Construction industry: Standardization leads high-quality development
1. Core standard system
The application of color coated steel plates in the field of construction in Shandong Province is based on YB/T 4456-2022 "Color coated steel plates and strips for construction". This standard was revised by Shandong Guanzhou Co., Ltd. and covers plates with a thickness of 0.20mm-2.0mm and a width of ≤ 1800mm. It clearly requires:
Substrate types: including hot-dip galvanized iron alloy, hot-dip aluminum zinc alloy, hot-dip galvanized aluminum alloy, and hot-dip galvanized aluminum magnesium alloy, excluding stainless steel and aluminum alloy substrates;
Coating structure: Adopting a 2/2 double-sided two-layer coating to enhance corrosion resistance and adhesion;
Quality grading: Products are classified into three levels: qualified, high-quality, and advanced. Differential evaluation is achieved through coating composition, environmental indicators (such as hexavalent chromium content ≤ 1ppm), solvent resistance wiping times (ordinary coating ≥ 100 times), and other indicators.
2. Key performance requirements
Corrosion resistance: The corrosion resistance of hot-dip aluminum zinc substrate (55% Al Zn) is 2-5 times that of hot-dip galvanized sheet, suitable for high corrosion environments;
Environmental friendliness: Prohibition of harmful substances such as cadmium and mercury, in compliance with the RoHS directive;
Processability: Supports forming processes such as cold bending and stamping to meet the requirements of complex building components.
3. Application scenarios and standards
Roof system: It is recommended to have a slope of ≥ 10 ° to avoid water accumulation; After installation, the board surface should be kept clean and away from corrosive media such as cement, acid and alkali;
Wall system: Mechanical properties such as wind load and snow load need to be considered, for example, the snow distribution coefficient of a single span double slope roof area is 1.25A (A is the horizontal projection area of the roof);
Maintenance requirements: Regular cleaning is required to avoid adhesion of high-temperature metal powder during cutting, and special repair coatings are needed to repair damaged coatings.
2、 Home appliance industry: Balancing performance and aesthetics
1. Substrate selection criteria
In the field of home appliances, electroplated galvanized color coated sheet is the main material. Due to its thin zinc layer (20/20g/m ²) and exquisite appearance, it is suitable for the manufacturing of casings for refrigerators, air conditioners, washing machines, and other devices. Shandong enterprises improve performance through the following technological optimizations:
Coating improvement: using high weather resistant polyester, silicon modified polyester and other coatings to enhance UV resistance and sulfur dioxide resistance;
Functional development: Launch special color coated boards such as anti-static, antibacterial, self-cleaning, etc. to meet personalized needs.
2. Typical application cases
Refrigerator shell: The coating is required to be scratch resistant and fingerprint resistant. A certain enterprise in Shandong has improved the corrosion resistance of the product by 30% by introducing epoxy back coating technology;
Air conditioning outdoor unit: using hot-dip galvanized substrate (galvanized amount 180g/m ²), combined with fluorocarbon coating, the service life is extended to more than 15 years.
3、 Transportation industry: balance between lightweight and durability
1. Standards in the automotive industry
The application of color coated plates in Shandong's automotive industry focuses on lightweight and corrosion resistance, with typical standards including:
Substrate thickness: Components such as the roof and back panel are made of 0.5mm-0.8mm thin plates, and weight reduction is achieved through high-strength structural steel (such as grade 550);
Coating performance: The salt spray resistance test is required to be ≥ 1000 hours, and the stone impact resistance performance should reach ISO 20567 standard level C.
2. Regulations in the field of ships
Compartment board: using hot-dip aluminum zinc substrate (aluminum zinc content 150g/m ²), combined with polyvinylidene fluoride (PVDF) coating, with excellent seawater corrosion resistance;
Welding requirements: The coating must meet the weldability test to avoid corrosion caused by coating detachment at the welding site.
4、 Packaging and machining industry: customized demand drives standard innovation
1. Packaging field
Food packaging: It is required that the coating comply with FDA standards. Shandong enterprises have reduced VOC emissions by developing water-based coatings instead of solvent based coatings;
Industrial packaging: using deep drawn color coated board with an elongation rate of ≥ 30%, meeting the requirements of complex shape packaging.
2. In the field of mechanical processing
Equipment casing: The coating is required to be resistant to engine oil and cutting fluid corrosion. A certain enterprise in Shandong has improved the wear resistance of the product by 5 times by introducing nano ceramic coating technology;
Precision parts: Using cold-rolled substrates (thickness 0.1mm-0.5mm) combined with laser cutting technology to achieve high-precision processing.
5、 Advantages and Industry Influence of Shandong Color Coated Plate Standards
1. Technological leadership
Quality grading system: Through the evaluation criteria of "leader", promote enterprises to improve environmental indicators (such as hexavalent chromium content ≤ 1ppm) and coating density, and promote high-quality and cost-effective products;
Optimization of detection method: 80V/50V DC method is used for leak detection, improving the detection accuracy to 0.5mm ².
2. Market adaptability
Regional customization: Develop hot-dip galvanized aluminum magnesium alloy substrate color coated sheets with stronger corrosion resistance for high humidity and high salt spray environments in the coastal areas of Shandong;
Industrial chain collaboration: Through the group standard "Quality Grading of Color Coated Steel Plates and Strips for Construction", guide upstream and downstream enterprises to collaborate and improve product quality.
3. Environmental Protection and Sustainable Development
Green production: Promote powder coating technology, reduce the use of solvent based coatings, and reduce VOC emissions by 80%;
Recycling: Establish recycling standards for color coated boards, promote the recycling of waste boards, and help achieve carbon neutrality goals.
