Degreasing allows for better adhesion. Degreasing steel surfaces is an important preparation for the final surface treatment.
Author: Marisa
Degreasing steel surfaces
Degreasing allows for better adhesion. Degreasing steel surfaces is an important preparation for the final surface treatment. If degreasing and disinfection are omitted, this will have an impact on the steel surface treatment. In order to obtain a clean and rough surface, the grease particles must be carefully removed. If done correctly, the cleaning process will facilitate the adhesion of the new coating. For example, the steel can be degreased using sandblasting.
It is crucial to remove grease and oil, otherwise you will not be able to get a good adhesion to the next layer. This poor adhesion will continue to damage all the next layers in the process.
Grease and oil contaminate the abrasive and thus the steel surface.
How do grease particles adhere to the surface?
Grease particles can adhere to the steel surface in various ways. The most common reasons are:
1. Mineral origin
These are mainly hydrocarbons composed of organic compounds and sulfur-containing compounds.
2. Natural origin
For example, linseed oil, rapeseed oil or tallow.
Degreasing uses the following chemical methods:
1. Dissolution
2. Saponification
Which degreasing method is used?
Existing degreasing methods are available:
• Electrolytic degreasing
• Emulsion cleaning
• Alkaline cleaning
• Solvent cleaning
• Vapor degreasing
• Acid cleaning
• Ultrasonic cleaning
Degreasing can be done by high-pressure spray, immersion bath or manually. The final result of degreasing is affected by temperature, bath movement, treatment time and type of cleaning agent.
The method of surface degreasing depends on the following criteria:
1. Technical requirements.
What kind of grease must be removed? How high is the required cleanliness? How big is the surface and what subsequent treatment is required? Questions to keep in mind when choosing a specific degreasing method.
2. Economic requirements
It is important to keep in mind the economic characteristics. For example, you have to consider the installation use and how much the installation costs. Is there a comparison of degreasers, treatment and labor costs?
3. Environmental requirements
Before starting a new project, it is important to know the local legislation, health requirements and storage permits. In addition to this, you must also be aware of waste disposal regulations.