Electroplating companies face a variety of challenges that affect both profitability and process stability. High energy losses, chemical emissions, evaporation and corrosion are among the most common problems that can burden operations and affect the quality of processes. Technical cover balls, such as those developed by Euro-Matic, offer an innovative and effective solution to these challenges.

Cover balls have been used in electroplating for decades and have proven to be an easy-to-implement but extremely effective measure for making processes more efficient, safer and more sustainable. This article highlights the specific advantages, technical functionality and economic effects of cover balls, with a particular focus on their application in electroplating.

Challenges in Electroplating

Electroplating is an industry with high technical and economic requirements. In open process baths, as often used in electroplating, numerous difficulties arise that must be overcome:

2.1 Heat and energy losses

Electroplating baths usually operate at temperatures between 50 °C and 80 °C, which leads to considerable heat losses. These are caused by:

• convection: Heat is released into the surrounding air.
• Radiation: Heat losses due to infrared radiation from the liquid surface.
• Evaporation: Most of the heat loss is caused by the energy required to evaporate water.

A study by the Technical University of Munich has shown that open surfaces have a heat loss of around 6.600 W/m². This leads to high operating costs, especially in systems with large bath areas.

2.2 Chemical emissions and evaporation

Evaporation is not just a question of energy. It also involves chemical losses, which require expensive additives to keep the chemical composition of the baths constant. In addition, many processes produce chemical vapors that enter the ambient air. These emissions are often harmful to health and can attack machines and other equipment in the area.

2.3 Occupational safety and environmental protection

Chemical emissions from electroplating baths are not only an environmental problem, but also pose a risk to the safety and health of employees. Chemical fumes and splashes from aggressive liquids can cause serious injuries. Effective protection of these surfaces is therefore essential.

2.4 Corrosion protection and process stability

Another critical point is the ingress of oxygen into the liquids. Oxygen promotes corrosion of metal parts and can affect the chemical stability of the baths. This leads to faster wear of the equipment and a deterioration in product quality.

Technical Function of the Cover Balls

Euro-Matic's technical cover spheres offer a simple and effective solution to these challenges. Their functionality is based on their ability to form a virtually closed, floating layer on liquids.

3.1 Materials and designs

The balls are made of robust plastics such as polypropylene (PP) and polyethylene (PE), which are both chemically resistant and durable. They are available in various sizes, with diameters of 38 mm and 50 mm being particularly popular.

3.2 Efficiency mechanisms

• thermal insulation: The balls minimize heat losses due to convection and radiation by covering the surface of the liquid and reducing the exchange processes with the air.
• reduction of evaporation: The balls prevent water from escaping into the surrounding air, saving both energy and water.
• barrier against emissions: The spherical layer forms a physical barrier that significantly reduces the escape of vapors and aerosols.

3.3 Easy integration

The cover balls are easy to install and adapt flexibly to the shape and size of the bathrooms. They do not require complex technical installations and can be cleaned and maintained without much effort.

Practical Applications in Electroplating

The versatility of the cover balls makes them an indispensable solution in electroplating. Here are some key areas of application:

4.1 Reduction of energy losses

Covering with balls drastically reduces heat loss in electroplating baths. According to measurements by the Technical University of Munich, heat loss drops from 6.600 W/m² for uncovered surfaces to around 1.100 W/m² when using covering balls. This leads to considerable energy savings.

4.2 Protection against chemical emissions

In anodizing and pickling baths, the balls reduce the emission of fumes and splashes, which improves the air quality in the plant and increases the safety of employees.

4.3 Process optimization and quality improvement

The even heat distribution through the balls ensures stable process conditions, which has a positive effect on the quality of the galvanized workpieces. In addition, the cover protects the liquid from external contamination such as dust or dirt.

Economical advantages

5.1 Energy savings

An example calculation shows the economic efficiency of the balls: A 10 m² electroplating bath saves up to 5.000 kWh of energy annually, which at a price of €0,10/kWh corresponds to around €500.

5.2 Reduction of operating costs

The savings on water and chemical additives also add up to several hundred euros per year. Added to this is the extended lifespan of the chemical baths due to the reduced oxygen absorption.

5.3 Fast amortization

The investment in cover balls usually pays for itself within a few months. This makes them one of the most cost-effective solutions for process optimization in electroplating.

customer perspectives and success stories

6.1 Experience reports from practice

Long-term users such as BP and Mobil Oil report positive experiences with Euro-Matic cover balls. They reduced operating costs and significantly improved the quality of their processes.

6.2 Adaptability

The balls are flexibly adaptable and can be used in a wide range of applications, from small process baths to large industrial plants.