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Key Factors Influencing the Degreasing Process of Degreasing Agents
The effectiveness of a degreasing agent largely depends on three main factors: mechanical action, degreasing time, and temperature. Understanding how these elements interact can significantly improve the efficiency and quality of the cleaning process.
Mechanical Action
Mechanical force plays a crucial role in the degreasing process. Methods such as pressure spraying or agitation help break down and remove oil films from the surface of parts. This action allows the degreasing solution to penetrate more effectively, emulsify the oils, and prevent them from re-adhering to the cleaned surfaces. When using spray systems, the fresh solution is forced into contact with the part’s surface, ensuring even distribution and better performance. In low- and medium-temperature degreasing, mechanical action becomes especially important. For example, pressure injection can be up to twice as fast as immersion methods, making it a preferred choice for many industrial applications.
Degreasing Time
The duration of the degreasing process also affects its success. A longer exposure time allows the degreasing agent to work more thoroughly on the oil and dirt. Typically, pressure degreasing takes between 1.5 to 3 minutes, while immersion degreasing may require 3 to 5 minutes. The exact time needed depends on the type and amount of contamination. Heavily soiled parts will need extended treatment to ensure all residues are removed.
Degreasing Temperature
Temperature has a significant impact on the degreasing process. Higher temperatures usually result in better results for several reasons.
First, increased temperature enhances the movement of surfactant molecules, improving their ability to penetrate, emulsify, and disperse oils. It also increases the solubility of contaminants in the solution. However, each degreasing agent has an optimal temperature range. If the temperature is too high, certain surfactants may precipitate, leading to poor performance and issues like uneven phosphating film formation.
Second, higher temperatures speed up chemical reactions. Generally, for every 10°C increase, the reaction rate doubles, which accelerates the overall cleaning process.
Third, temperature changes the physical properties of the oil itself. For instance, heavy oils like rust-preventive grease or solid paraffin are difficult to remove at lower temperatures. But when the temperature rises, their viscosity decreases, making them easier to break down and wash away.
[Source: Hefei Xianghe Phosphate Coating Co., Ltd. http:// ]