1.What are the scenarios where SECC is preferred?
Electronic Equipment and Precision Instruments
Typical Applications: Computer Cases, Mobile Phone/Tablet Housings, Printer/Copier Frames, Server Cabinets.
Home Appliance Interiors and Control Panels
Typical Applications: Microwave Ovens, Air Conditioner Control Panels, Washing Machine Operating Panels, Refrigerator Interiors.
Automotive Interiors
Typical Applications: Instrument Panel Brackets, Door Interior Panels, and Seat Adjustment Components.
2.What are the reasons for preferring SECC?
Electronic Equipment and Precision Instruments
Suitability:
Precision stamping (such as deep drawing and stretching) and multiple bending are required. The SECC zinc layer is thin and ductile, resisting cracking during processing and meeting complex structural requirements.
The surface is smooth and spangle-free, meeting appearance requirements without additional treatment. The fingerprint-resistant treatment (SECC-N) reduces oil and dirt adhesion, making it suitable for exposed use.
Predominantly in dry indoor environments, the zinc layer thickness (20-60g/m²) is sufficient for daily corrosion protection, eliminating the need for a thicker zinc layer.
Appliance Interiors and Control Panels
Suitability:
High requirements for surface flatness and decorative finish. SECC's glossy surface allows for direct painting or lamination, resulting in strong coating adhesion and minimal bulging or pinhole formation.
For applications requiring tight radius bends (such as 90° corners), SECC's zinc coating resists peeling, ensuring machining accuracy.
For indoor use, where extreme weather conditions are not a concern, SECC's corrosion resistance is sufficient.
Automotive interior parts
Reasons for suitability:
Requires complex stamping and forming (such as curved surface stretching). SECC's deep-drawing performance is superior to SGCC, reducing scrap.
Requires high welding requirements (such as spot welding assembly). SECC's thin zinc layer reduces porosity during spot welding and ensures stable weld strength.
Interior parts require high aesthetics. SECC's surface has minimal defects and is suitable for subsequent painting or coating.
3.What are the scenarios where SGCC is preferred?
Typical applications include roof panels, wall panels, steel structure supports, guardrails, and ventilation ducts.
Household appliance exterior units and outdoor equipment
Typical applications: air conditioner exterior casings, water heater housings, outdoor distribution boxes, and streetlight brackets.
Typical applications: racks, pallets, tool boxes, and heavy machinery enclosures.
4.What is the reason for giving priority to SGCC?
Outdoor buildings and structural components
Suitability:
Required to withstand long-term exposure to rain, sun, and high humidity. SGCC's thick zinc layer (80-180g/m²) and zinc-iron alloy layer offer corrosion resistance 2-3 times that of SECC, resulting in a service life of 10-15 years.
Processing primarily involves simple bending and cutting, without deep drawing, minimizing the impact of SGCC's process limitations.
Appearance requirements are less demanding (zinc spangles can be concealed with paint), and SGCC's cost is 10%-20% lower than SECC, making it suitable for large-scale applications.
Household appliance outdoor units and outdoor equipment
Reasons for suitability:
SGCC's thick zinc layer resists rust when exposed to outdoor or humid environments, making it particularly advantageous in rainy or coastal areas (where high salt spray is present).
For simple structures (such as flat-plate bending), SGCC's processing performance is sufficient and offers a lower cost.
Painting can further enhance weather resistance, without relying on the appearance of the zinc layer.
Industrial warehousing and heavy-duty components
Reasons for suitability:
Prioritizing structural strength and corrosion resistance, with minimal processing requirements (mostly welding or simple bending), SGCC offers a more cost-effective solution.
Despite potential exposure to oil, moisture, and other contaminants, a thick zinc coating provides more reliable protection and reduces maintenance costs.
5.What is the core basis for making selection decisions?
Processing complexity: SECC is preferred when complex forming such as deep drawing, stretching, and small radius bending is required; SGCC is preferred when simple cutting, welding, and large radius bending are required.
Operating environment: SECC is preferred for indoor dry environments without severe climate impacts; SGCC is preferred for outdoor, humid, high salt fog or corrosive environments
Appearance requirements: SECC is preferred if the surface needs to be exposed or coated with high precision (no defects, high gloss); SGCC is preferred if the appearance requirements are low and zinc spangles or subsequent painting can be accepted.