O9W0000521 0.4*1000*C Silver Grey Fluorocarbon Color Coated Steel Coil, Authentic Baosteel Color Coated Sheet Price Purification Special*High-Quality Purification White Grey Color Coated Steel Coil 0.5*1200PEZ120 Baosteel Color Coated Sheet Roll

　　Specs

　　FA Color Coated Steel Coil (Galvanized) 1.0*1200mm, Pearl White 2/1M, Baosteel 3.32, O8W0003421, Negotiable, Yongkong Warehouse

　　FA Coated Steel Coil (Galvanized) 1.0*1200mm, Pearl White 2/1M, Baosteel 3.385 O8W0003420, Negotiable, Yongkong Warehouse

　　TDX51D+AZ 1.5*1250*C Light Jade/Gray Black Angang 9.92 XXX Negotiable On the Way

　　TDX51D+AZ 1.5*1250*C Light Jade/Gray Black Angang 9.496 XXX Negotiable on Site, In Transit

　　TDX51D+AZ 1.5*1250*C Grey Jade/Grey Black Angang 9.586 XXX Negotiable On the Way

　　TDX51D+AZ 1.5*1250*C Grey Jade/Gray Black Angang 9.73 XXX Negotiable on-site

　　TDX51D+AZ 1.5*1250*C Light Jade/Yellow/Gray Black Angang 9.486 Negotiable on Delivery In Transit

　　TDX51D+AZ 1.5*1250*C Light Jade/Gray Black Angang 9.692 XXX Negotiable on Site, In Transit

　　TDX51D+AZ 1.5*1250*C Grey Jade/Charcoal Grey Angang 5.086 XXX Negotiable On the Way

　　0.35*1200～～5490

　　0.37*1200～～5420

　　0.4*1200～～ 5350

　　0.42*1200～～5320

　　0.45*1200～～5290

　　0.47*1200～～5260

　　0.5*1200～～ 5240

　　Explanation of Baosteel Color Steel Plate Steel

　　Microwave Oven Enclosures: TSTCD, TDC51D+Z, thickness 0.45-0.6mm, oil-resistant coating.

　　Refrigerator U Shell: TDC51D+Z, thickness 0.4-0.5mm, oil-resistant coating KY.

　　Refrigerator Door Shell: TSTCD, TDC52D+Z, thickness 0.4-0.5mm, oil-resistant coating KY.

　　Cold storage cabinet shell side panels, back panels, and door cover shell: TSTCD, TDC52D+Z, thickness 0.4-0.5mm, oil-resistant coating.

　　Oil-resistant color steel plate features a dual-anti design with low surface free energy (hydrophobic + oleophobic), achieving oil resistance and easy cleaning properties, while meeting all requirements of home appliance PCM.

　　Oil-resistant colored galvanized steel sheet has excellent hydrophobic and oleophobic properties, offering better slipperiness than common coatings, significantly reducing dust adhesion, and possessing a certain graffiti resistance. It also improves the coating's washability, maintaining a clean appearance over a long period. Oil-resistant colored galvanized steel

　　Panels are suitable for appliances' exterior surfaces in kitchens, bathrooms, and other settings with a certain requirement for easy cleaning.

　　Welding galvanized steel plates requires considering the coating first, as different thicknesses and types of coatings have varying welding requirements. However, there is also a certain pattern to it.

　　Firstly, the thicker the coating, the greater the welding difficulty. The material sent by this friend is a 20/20 electroplated zinc with a zinc layer thickness, which did not have any welding issues. The problem arose with the 50/50, where the zinc layer thickness changed; if the welding process remains unchanged, it is prone to issues.

　　The issue.

　　Next, different coatings have varying welding difficulties. Below is the order of welding difficulty:

　　The coatings commonly seen today typically contain zinc, aluminum, or magnesium. Among these three elements, aluminum is the most difficult to weld, followed by zinc. Therefore, coatings with higher aluminum content are harder to weld, and the same applies to zinc.

　　The zinc-iron alloy coating is easier to weld compared to pure zinc coatings, as some of the iron from the base plate has渗透 into the zinc layer, reducing the zinc content.

　　Galvanized aluminum is easier to weld than zinc aluminum magnesium, while aluminum-zinc is more difficult, due to the varying aluminum content among the three, as shown in the table below:

　　Types of Coating | Coating Requirements

　　Galvanized Aluminum (ZA) with 5% Aluminum (Al), the remainder being Zinc (Zn) and other elements

　　Galvanized Aluminum Magnesium (ZAM) with 5.0%-13.0% Al, 2.0-4.0% Mg, 1.0% for other elements, the remainder being Zn.

　　Aluminum-Zinc (AZ) coated, with approximately 55% by mass of aluminum, 1.6% by mass of silicon, and the remainder zinc.

　　The table shows that the zinc-aluminum (ZA) alloy has a low aluminum content, followed by ZAM, while the aluminum-zinc alloy contains up to 55% aluminum, making welding more challenging.

　　Afterward, we return to the initial question in the article: With increased coating thickness, how should welding be performed? When other parameters are the same but the coating thickness varies, as the coating thickness increases, the minimum welding current Imin should be raised, and the maximum welding current Imax should be reduced, resulting in the following...

　　Welding current range reduced.