{"id":27769,"date":"2026-06-16T17:40:46","date_gmt":"2026-06-16T09:40:46","guid":{"rendered":"https:\/\/wanzhisteels.com\/?p=27769"},"modified":"2026-06-16T17:41:03","modified_gmt":"2026-06-16T09:41:03","slug":"sgcc-vs-secc-galvanized-steel-for-home-appliances","status":"publish","type":"post","link":"https:\/\/wanzhisteels.com\/ar\/sgcc-vs-secc-galvanized-steel-for-home-appliances\/","title":{"rendered":"SGCC vs SECC Galvanized Steel for Home Appliances"},"content":{"rendered":"

Galvanized steel sheet is one of the most common metal materials used in the manufacture of home appliances such as refrigerators, washing machines, air conditioners, and microwave ovens. It not only determines the product’s corrosion resistance, appearance quality, and lifespan, but also directly affects manufacturing costs and subsequent coating effects.<\/p>\n\n\n\n

Currently, the two most commonly used types of galvanized steel in the home appliance industry are SGCC hot-dip galvanized steel<\/span><\/a> sheet and SECC electro-galvanized steel sheet. Although both are galvanized steel, they differ significantly in production processes, coating thickness, corrosion resistance, surface smoothness, and application locations.<\/p>\n\n\n\n

\"Typical<\/figure><\/div>\n\n\n\n

So, which is more suitable for home appliance manufacturing: SGCC or SECC?<\/p>\n\n\n\n

What is SGCC Galvanized Steel?<\/h2><\/div>\n\n\n\n

SGCC (Steel Galvanized Commercial Cold Rolled) is a type of hot-dip galvanized steel<\/a> sheet defined in Japanese Industrial Standard JIS<\/a> G3302. It typically uses cold-rolled steel (such as SPCC) as the base material, and then forms a zinc protective layer through a continuous hot-dip galvanizing process.<\/p>\n\n\n\n

During the production process, the steel sheet is immersed in molten zinc, resulting in a thick zinc layer on the surface, thus providing excellent rust resistance.<\/p>\n\n\n\n

Features of SGCC:<\/h3><\/div>\n\n\n\n

High corrosion resistance<\/p>\n\n\n\n

Thicker zinc coating for longer lifespan<\/p>\n\n\n\n

Suitable for humid environments<\/p>\n\n\n\n

Relatively low cost<\/p>\n\n\n\n

Suitable for internal structural components of household appliances<\/p>\n\n\n\n

What is SECC galvanized steel?<\/h2><\/div>\n\n\n\n

SECC (Electro-Galvanized Cold Rolled Steel) is an electro-galvanized steel sheet defined in Japanese standard JIS G3313. It uses an electrolytic process to deposit a uniform zinc layer on the surface of cold-rolled steel.<\/p>\n\n\n\n

Unlike SGCC, SECC has a thinner zinc layer but a more uniform and smoother surface, making it widely used in household appliance components where painting, stamping, and aesthetic requirements are high.<\/p>\n\n\n\n

Features of SECC:<\/h3><\/div>\n\n\n\n

Smooth and flat surface<\/p>\n\n\n\n

Better coating adhesion<\/p>\n\n\n\n

Suitable for precision stamping<\/p>\n\n\n\n

Superior appearance<\/p>\n\n\n\n

More suitable for visible casings<\/p>\n\n\n\n

\n
\n
\"SECC<\/figure><\/div>\n<\/div>\n\n\n\n
\n
\"SGCC<\/figure><\/div>\n<\/div>\n<\/div>\n\n\n\n

SGCC vs SECC Galvanized Steel Parameter performance<\/h2><\/div>\n\n\n\n
\n
\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\u0645\u0634\u0631\u0648\u0639\u0646\u0627 <\/td>\n SGCC <\/td>\n SECC <\/td>\n <\/tr>\n <\/thead>\n
\u0645\u0639\u064a\u0627\u0631 <\/td>\n JIS G3302 <\/td>\n JIS G3313 <\/td>\n <\/tr>\n
Galvanizing Method <\/td>\n Hot-Dip Galvanized <\/td>\n Electro-Galvanized <\/td>\n <\/tr>\n
Zinc Plating <\/td>\n Z30~Z275 g\/m\u00b2 (Thicker) <\/td>\n Z10~40 g\/m\u00b2 (Thinner)<\/td>\n <\/tr>\n
Corrosion Resistance <\/td>\n Stronger <\/td>\n Medium <\/td>\n <\/tr>\n
\u0633\u0645\u0627\u0643\u0629 <\/td>\n 0.12~3.2 mm <\/td>\n 0.4~2.3 mm <\/td>\n <\/tr>\n
Surface Condition <\/td>\n Common Spangle \/ Small Spangle \/ Spangle-Free (Slightly Rough) <\/td>\n Smooth, Uniform, No Obvious Spangles (Smooth and Flat) <\/td>\n <\/tr>\n
Coating Performance <\/td>\n Good <\/td>\n Excellent <\/td>\n <\/tr>\n
\u0627\u0644\u0631\u0643\u064a\u0632\u0629 <\/td>\n Cold-Rolled Steel (SPCC) <\/td>\n Cold-Rolled Steel (SPCC) <\/td>\n <\/tr>\n
Forming Performance <\/td>\n Good <\/td>\n More Suitable for Precision Stamping <\/td>\n <\/tr>\n
Appearance <\/td>\n Industrial <\/td>\n High-End <\/td>\n <\/tr>\n
Cost <\/td>\n Lower <\/td>\n Higher <\/td>\n <\/tr>\n
Typical Applications <\/td>\n Internal Structural Components <\/td>\n Exterior Panels <\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n\n\n

Comparison of corrosion resistance<\/h3><\/div>\n\n\n\n

In terms of rust prevention, SGCC is significantly superior to SECC.<\/p>\n\n\n\n

This is because SGCC typically has a thicker hot-dip galvanized layer, forming stronger sacrificial anode protection, thus exhibiting greater stability in humid kitchens, bathrooms, and other high-humidity environments.<\/p>\n\n\n\n

While SECC also offers corrosion resistance, its thinner zinc layer usually requires additional spraying or powder coating protection in high-humidity environments.<\/p>\n\n\n\n

Surface quality and appearance differences<\/h3><\/div>\n\n\n\n

For appliance exterior components, SECC is generally more advantageous. SECC uses electroplating to form a uniform zinc layer, therefore:<\/p>\n\n\n\n

SECC GI Steel has a smoother surface.<\/p>\n\n\n\n

It is easier to powder coat and paint.<\/p>\n\n\n\n

It is less prone to zinc spangle patterns.<\/p>\n\n\n\n

And it is more suitable for high-end appliance designs.<\/p>\n\n\n\n

In contrast, SGCC may have noticeable zinc spangles and is slightly less smooth.<\/p>\n\n\n\n

\n
\n
\"Applications<\/figure><\/div>\n<\/div>\n\n\n\n
\n
\"\"<\/figure><\/div>\n<\/div>\n\n\n\n
\n
\"SECC<\/figure><\/div>\n<\/div>\n<\/div>\n\n\n\n

Spraying and Processing Performance<\/h3><\/div>\n\n\n\n

In terms of coating performance, SECC is favored by home appliance manufacturers.<\/p>\n\n\n\n

Its uniform surface provides:<\/p>\n\n\n\n

better coating adhesion.<\/p>\n\n\n\n

more uniform color effect.<\/p>\n\n\n\n

higher coating consistency.<\/p>\n\n\n\n

Therefore, many high-end refrigerator, washing machine, and microwave oven panels prioritize the use of SECC.<\/p>\n\n\n\n

Cost Comparison<\/h3><\/div>\n\n\n\n

In terms of cost-effectiveness, SGCC has a greater advantage.<\/p>\n\n\n\n

Due to the high efficiency of continuous hot-dip galvanizing production and its widespread industrialization, SGCC is often more economical and is therefore commonly used in:<\/p>\n\n\n\n

Internal frames of home appliances<\/p>\n\n\n\n

Base and rear plates<\/p>\n\n\n\n

Strengthening structural components<\/p>\n\n\n\n

SECC, on the other hand, typically has a higher unit cost due to its higher process precision.<\/p>\n\n\n\n

\n
\n
\"SGCC<\/figure><\/div>\n<\/div>\n\n\n\n
\n
\"SGCC<\/figure><\/div>\n<\/div>\n\n\n\n
\n
\"Application<\/figure><\/div>\n<\/div>\n<\/div>\n\n\n\n

Applications of SGCC and SECC in the home appliance industry<\/h2><\/div>\n\n\n\n

Refrigerator<\/strong><\/p>\n\n\n\n

SGCC: Back panel, bottom panel, corrosion-resistant support structure<\/p>\n\n\n\n

SECC: Door panel, visible decorative panel<\/p>\n\n\n\n

Washing Machine<\/strong><\/p>\n\n\n\n

SGCC: Internal frame, rust-resistant structural components<\/p>\n\n\n\n

SECC: Outer casing, visible cover<\/p>\n\n\n\n

Air Conditioner<\/strong><\/p>\n\n\n\n

SGCC: Outdoor unit casing (high corrosion resistance requirements)<\/p>\n\n\n\n

SECC: Indoor unit decorative panel<\/p>\n\n\n\n

Microwave Oven<\/strong><\/p>\n\n\n\n

SGCC: Internal shielding structure<\/p>\n\n\n\n

SECC: External metal casing<\/p>\n\n\n\n

In fact, modern home appliances often use a “SGCC + SECC combination solution,” that is: SGCC is used for internal corrosion protection, and SECC is used for external aesthetics. This ensures durability while also considering product appearance and cost control.<\/p>\n\n\n\n

How to Choose: SGCC or SECC?<\/h2><\/div>\n\n\n\n

When choosing SGCC:<\/strong><\/p>\n\n\n\n

Higher corrosion resistance
Lower procurement cost
Suitable for use in humid environments
Internal structural components of home appliances<\/p>\n\n\n\n

When choosing SECC:<\/strong><\/p>\n\n\n\n

Better surface quality
Superior coating effect
High-end exterior components of home appliances
Precision stamping<\/p>\n\n\n\n

In conclusion<\/h2><\/div>\n\n\n\n

In comparing SGCC <\/span><\/a>vs SECC galvanized steel<\/a> used in home appliance manufacturing, neither is inherently superior; rather, they each have their strengths: SGCC emphasizes corrosion resistance, cost-effectiveness, and structural strength, making it more suitable for internal protective components. SECC emphasizes appearance, smoothness, and paintability, making it more suitable for visible casings and high-end panels.<\/p>\n\n\n\n

For most home appliance manufacturers, the optimal approach is usually a hybrid approach: utilizing SGCC for durability and SECC for aesthetic quality, thus achieving the best balance between cost, performance, and aesthetics.<\/p>\n\n\n\n