Graphite Balls Peripheral Austenite Haze Formation
Graphite balls have become a popular material used in a variety of industries and have found a number of uses in applications such as shipbuilding, automotive, and even aerospace. It is popular due to its unique physical and chemical properties which make it suitable for a wide range of applications. Graphite balls also have a number of aesthetic advantages as well as being shock, vibration and corrosion resistant. However, a common problem that can occur with the use of graphite balls is the formation of a peripheral Austenite haze.
Austenite haze is a type of corrosion that forms around graphite balls and other materials that contain ferrous alloys. This corrosion usually has a silver-gray color and is typically referred to as a haze of oxidation products rather than rust. It usually appears as a ring-shaped deposit which may vary in thickness from spot to spot. The formation of Austenite haze is usually caused by a chemical reaction between the ferrous alloy and the atmospheric oxygen.
The formation of Austenite haze can be a significant problem for companies that use graphite balls in their manufacturing process. Not only does Austenite haze reduce the aesthetic appeal of the graphite balls, but it can also affect their performance and even lead to premature failure. In order to prevent the formation of Austenite haze, it is important to understand the various causative factors behind the corrosion and take measures to reduce its incidence.
In general, Austenite haze forms when an outer layer of the material has been exposed to an oxidizing atmosphere. Graphite balls are particularly susceptible to this type of corrosion as they can absorb oxygen from the atmosphere more efficiently than other materials. As a result, the reaction rate increases significantly and a porous layer of oxidized material may start to form. In order to reduce the risk of Austenite haze, the corrosion should be prevented at its source by ensuring the graphite balls are not exposed to an oxidizing atmosphere or extreme temperatures.
In addition to reducing exposure to an oxidizing atmosphere, the use of protective coatings on graphite balls can also be beneficial in reducing the instance of Austenite haze. These coatings are usually applied in a two layer process, with a base layer of chrome oxide which is then topped with a polymer finish. The chrome oxide acts as a sacrificial barrier that protects the underlying material, while the polymer finish helps to further seal in the oxygen. By using this two-layer process, the life of the graphite balls can be significantly increased and the incidence of Austenite haze greatly reduced.
Preventing the formation of Austenite haze is a critical part of ensuring that graphite balls are able to perform at their best and maintain their aesthetic appeal. It is important to understand the possible causes of the corrosion and take steps to reduce the risk of exposure. In addition, using protective coatings on graphite balls can go a long way in helping to prevent the formation of Austenite haze and further increasing the life of the material.
