What is enameled steel strips?
Enameled steel bars refer to steel bars whose surface has been treated with enameling technology (enamel technology). They combine the strength of steel with the corrosion resistance and beauty of enamel. The enamel layer isolates the steel from the external environment to prevent rust. The surface is smooth and non-porous and easy to clean. Ordinary paint or plating is more wear-resistant and high-temperature resistant.
What does the "enamel" in enameled steel strip mean?
Porcelain Enamel is a process that melts glass enamel at high temperature and attaches it to the metal surface. The resulting coating has both the chemical stability of glass and the strength of metal. It has the functions of rust prevention (steel bars are easily oxidized, and enamel completely isolates water and oxygen), beautiful appearance (can be made into white, color or pattern), and durability (more than 10 times longer than paint, suitable for outdoor or industrial environments).
Which is better enamel or stainless steel?
Enameled steel has a strong corrosion resistance and a lifespan far exceeding that of stainless steel, making it suitable for highly corrosive environments such as chemical industry and water heaters; stainless steel is not easy to break and is easy to maintain. It is flexible to process and can be welded and bent, making it suitable for complex structures
How to choose enameled steel strips?
Key grades performance comparison
|
Brand |
C% |
Ti% |
Elongation% |
Adhesion strength(MPa) |
|
BTPE1 |
≤0.005 |
0.05~0.12 |
≥40 |
≥18 |
|
ASTM A424 Type1 |
≤0.008 |
≥0.04 |
≥38 |
≥15 |
|
DC04EK |
≤0.01 |
- |
≥42 |
≥16 |
Priority is given to scale resistance: Select grades containing Ti/Nb (such as BTPE1, ASTM A424).
Deep drawing requirements: high r-value grades (DC04EK, r≥1.8).
Cost sensitive: ordinary phosphating enameled steel (such as B440PEC).
Does enamelled steel rust?
Before being enameled, the enameled steel strip is a low-carbon cold-rolled steel plate with no protective layer on the surface. It will rust when exposed to a humid environment (the same as ordinary steel). After the complete enameling process, the finished product will not rust.
The stainless principle of enamel products
|
Protection mechanism |
Technical Description |
|
Physical isolation |
0.2~0.5mm thick glaze layer completely covers the steel substrate, isolating water and oxygen (permeability <0.01g/m²·day) |
|
Chemical inertness |
The glaze contains SiO₂ (60~70%), B₂O₃ (10~20%), and is resistant to acid and alkali (pH 2~12) |
|
Interface bonding |
During firing, a FeO·Cr₂O₃ transition layer is formed to prevent corrosive media from penetrating into the substrate |
