What are the corrosion resistance and oxidation resistance of manganese copper alloy resistors and constantan alloy resistors, respectively?

Manganese copper alloy resistors and constantan alloy resistors each have their own characteristics in terms of corrosion resistance and oxidation resistance. The following is a detailed analysis:
Manganese copper alloy resistor

Corrosion resistance: Manganese copper alloy resistors typically exhibit good corrosion resistance in conventional environments. The addition of manganese element helps to enhance the corrosion resistance of the alloy, especially in humid or corrosive environments. Manganese copper alloy can form a dense oxide film to protect the resistor from corrosion. However, the specific corrosion resistance also depends on factors such as the composition ratio of the alloy, treatment process, and environmental conditions.
Oxidation resistance: Manganese copper alloy resistors also exhibit good oxidation resistance. At high temperatures, manganese copper alloy can form a stable oxide film, effectively preventing further oxidation reactions. This antioxidant performance enables manganese copper alloy resistors to have a longer service life and stable resistance characteristics in high-temperature applications.

Copper alloy resistor

Corrosion resistance: Copper alloy resistors typically exhibit good corrosion resistance due to the presence of certain amounts of nickel and chromium elements. The addition of chromium can significantly improve the corrosion resistance of alloys, especially in oxidizing environments and environments containing corrosive gases such as chlorine and sulfur. Therefore, copper alloy resistors have a wide range of applications in highly corrosive environments such as chemical and marine industries.
Oxidation resistance: Copper alloy resistors also have certain oxidation resistance properties. Under high temperature conditions, constantan alloy can form a protective oxide film, thereby slowing down the oxidation rate. However, compared to manganese copper alloy, the oxidation resistance of constantan alloy may be slightly inferior. This mainly depends on the specific composition and proportion of the alloy, as well as factors such as the temperature and atmosphere of the usage environment.

summary
Manganese copper alloy resistors and constantan alloy resistors each have advantages in corrosion resistance and oxidation resistance. Manganese copper alloy resistors exhibit good corrosion resistance and oxidation resistance in conventional environments, making them particularly suitable for applications that require high temperature stability. Copper alloy resistors, on the other hand, have stronger corrosion resistance due to their presence of the corrosion-resistant element chromium, making them more suitable for use in highly corrosive environments. When selecting resistors, the advantages and disadvantages of these two alloy resistors should be weighed according to the specific application environment and requirements, in order to choose the most suitable type of resistor.