Page 1666 - MiSUMi 2025

[Materials]
Corrosion Resistance of Metal Materials and Their Surface Treatment / Anti-rust Method

Ⅰ. Corrosion Resistance of Metal Materials and Their Surface Treatment
Test Method: Conduct the composite corrosion test according to GB/T 20854—2007 cyclic test method
Test Conditions: ➀ Salt Water Spray Test (5%NaCl.35℃) 2hr }
➁ Dry (60℃ ) 4hr 8hr is one cycle
➂ Wet (95%RH. 35℃±2℃ ) 2hr

1. Comparison of Different Metal Materials (No Surface Treatment) Table 1
Material S45C SUJ2 SUS440C SUS304 SUS316 ＊G－STAR

Before Test

48hr

168hr

*G-Star is martensitic stainless steel (pre-hardened die steel) made by Daido Steel Co., Ltd.

2. Comparison of Different Surface Treatments with the Same Material (SUJ2) Table 2
Surface Treatment Not Provided Black Oxide Film Hard Chrome Plated

Before Test

48hr

168hr

B-021