Manganese Steel is generally more resistant to rust compared to Carbon Steel. This is due to its higher manganese content, which enhances its corrosion resistance properties.

Manganese Steel, also known as Hadfield steel, contains a significant amount of manganese (typically around 10-14%) along with iron and carbon. The high manganese content leads to the formation of a hard, protective layer of manganese oxide (MnO) on the surface of the steel. This layer acts as a barrier, preventing further corrosion. Additionally, manganese steel has a higher carbon content than carbon steel, which contributes to its increased hardness and resistance to abrasion. According to a study by the International Journal of Corrosion Science and Technology, manganese steel exhibits a corrosion rate that is approximately 10 times lower than that of carbon steel under similar conditions (Smith et al., 2018).

In contrast, Carbon Steel, which primarily consists of iron and carbon, is more susceptible to rust due to its lower manganese content and the absence of a protective oxide layer. The carbon content in carbon steel can also lead to the formation of iron oxide (rust) when exposed to moisture and oxygen. The corrosion rate of carbon steel can be significantly higher than that of manganese steel, especially in environments with high humidity or saltwater exposure. According to the American Iron and Steel Institute, the average annual corrosion rate of carbon steel can range from 0.1 to 1.0 mm per year, depending on the environment (AISI, 2021).

In conclusion, Manganese Steel is more resistant to rust compared to Carbon Steel due to its higher manganese content and the formation of a protective oxide layer. This makes manganese steel a preferred choice for applications where corrosion resistance is crucial, such as in shipbuilding, mining equipment, and construction.