The protective film thickness does not directly affect the steel plate’s core properties such as strength, hardness, or corrosion resistance.
Key points:
The film only protects the surface and does not chemically react with the substrate or alter the metallographic structure.
Thickness mainly affects protection:
Thin (40–60 μm): moderate protection, suitable for indoor short-term assembly, guards against light scratches and grease, less resistant to puncture or abrasion.
Thick (60–80 μm): stronger puncture and tensile resistance, suitable for outdoor storage, long-distance transport, or complex assembly, higher cost.
Too thick (>100 μm) may reduce adhesion, edges may lift, complicating removal and reducing effectiveness.
Choose thickness based on the application scenario; it does not affect the steel’s intrinsic properties.