Page 1587 - MISUMI Thailand Economy Series

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

Ⅰ. Corrosion Resistance of Metal Materials and Their Surface Treatment Ⅱ. Anti-Rust Method
Test Method: Conduct the composite corrosion test according to GB/T 20854—2007 cyclic test method Metal corrosion is caused by various internal and external factors. Some common factors and corresponding countermeasures are listed
Test Conditions: ① Salt Water Spray Test (5%NaCl.35℃) 2hr } below.
② Dry (60℃ ) 4hr 8hr is one cycle Factors affecting the corrosion of metal Countermeasures to slow down rusting
③ Wet (95%RH. 35℃±2℃ ) 2hr
Adopt materials with stronger anti-rust ability. For anti-rust ability
1 Chemical composition and structure of metal itself
1. Comparison of Different Metal Materials (No Surface Treatment) Table 1 comparison of materials, refer to Table 1 on P.1581.
Material S45C SUJ2 SUS440C SUS304 SUS316 ＊G－STAR Adopt surface treatments with stronger anti-rust ability. For anti-rust
2 Surface treatment method of metal
ability comparison of surface treatments, refer to Table 2 on P.1581.
3 Metal surface finish Select products with high processing accuracy
Before Test
Avoid contact with media that tend to cause rusting of the material rust, such as hand sweat.
4 Media composition in contact with metal surface
Regularly spray anti-rust oil. Refer to Table 3 on this page for the effect of spraying anti-rust oil.
The higher the ambient temperature and humidity, the
5 more easily the metal corrodes. Maintain a low humidity and temperature environment.
48hr

Test Method: Conduct the composite corrosion test according to GB/T 20854—2007 cyclic test method
Test Conditions: ① Salt Water Spray Test (5%NaCl.35℃) 2hr }
② Dry (60℃ ) 4hr 8hr is one cycle
168hr ③ Wet (95%RH. 35℃±2℃ ) 2hr

Comparison of Corrosion of SUJ2 Material (Without Surface Treatment) under Different Maintenance
*G-Star is martensitic stainless steel (pre-hardened die steel) made by Daido Steel Co., Ltd. Conditions (Reference) Table 3
Whether anti-rust oil is sprayed
2. Comparison of Different Surface Treatments with the Same Material (SUJ2) Table 2 Placement Time
Surface Treatment Not Provided Ferroferric Oxide Protective Film Hard Chrome Plated Provided Not Provided

Before Test
Before Test

8hr
48hr

24hr
168hr

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