In the jewelry, watchmaking, and luxury product industries, gold plating not only enhances aesthetics but also improves durability and adds value to the product. One of the leading gold plating chemicals today is Auruna 570. This is a cyanide-based alkaline alloy electroplating solution designed to produce a unique green-yellow gold coating. Let’s explore the Auruna 570 gold plating solution and its applications in this article.
1. General Introduction to Auruna 570
Auruna 570 is a gold-silver (Au-Ag) alloy plating solution with 75% gold and 25% silver, producing a coating with high purity and a hardness of up to 115 HV. With this coating, you can easily achieve superior brightness, even when the gold layer is thick, which is a feature that few other gold plating solutions can match.
This green-yellow gold plating offers a distinctive color, making products appear luxurious and different from traditional gold coatings. Auruna 570 not only produces a visually attractive coating but also helps to conserve gold effectively, making it ideal for thick plating while maintaining brightness and an impressive appearance.
2. Key Advantages of Auruna 570
2.1 Gold Conservation
Auruna 570 helps maximize gold savings by using an Au-Ag alloy coating. With 75% gold, the coating still retains durability and a shiny finish similar to pure gold, allowing manufacturers to save on raw material costs without compromising quality.
2.2 Bright, Durable Coating
Even with a coating thickness over 10 µm, the product maintains a glossy, fresh appearance. This is essential for creating high-end products that last long and retain their luxurious look.
2.3 Easy Maintenance and Care
With high stability, maintaining and servicing the Auruna 570 plating bath has never been easier. Gold plating systems using this chemical can operate continuously without encountering complex issues.
2.4 RoHS Compliance
One significant advantage of Auruna 570 is that the coatings meet RoHS (Restriction of Hazardous Substances) standards, making the products environmentally friendly and safe for users’ health.
2.5 Suitable for Rack and Barrel Plating
Auruna 570 can be applied for both rack plating and barrel plating methods. This flexibility allows manufacturers to choose the plating method best suited to their production process without needing to change the plating chemistry.
3. Characteristics of Auruna 570 Plating Layer
The plating layer produced by Auruna 570 has the following key technical features:
- Plating Type: Au-Ag (Gold-Silver)
- Purity: 75% Au, 25% Ag
- Color: Green-yellow
- Hardness: 115 HV
- Thickness: > 10 µm
- Density: 15.5 g/cm³
This coating has a thickness of over 10 µm, ensuring durability and long-lasting brightness, while its high density improves adhesion to the material surface.
4. Applications of Auruna 570 Gold Plating Solution
Auruna 570 is widely used in industries that require high-quality and durable gold plating. Some of the typical applications of this product include:
4.1 Jewelry and Accessories
With its shiny and durable properties, Auruna 570 is an ideal choice for jewelry products such as rings, necklaces, bracelets, and earrings. The unique green-yellow color gives products a luxurious and sophisticated look, appealing to modern consumer tastes.
4.2 Watches
Gold-plated watches can withstand environmental impacts without fading or oxidizing. The gold plating from Auruna 570 ensures high durability, shine, and protection against harmful factors.
4.3 Frames and Household Items
Auruna 570 can also be used for gold plating on frames, home decor items such as lamps, and interior accessories. The plating not only enhances the product’s appearance but also increases its value and protects the surface from scratches and oxidation.
5. Gold Plating Process with Auruna 570
To achieve the best quality gold plating, the gold plating process with Auruna 570 must be carried out accurately and scientifically. The steps in this process require not only high technical skills but also the maintenance of a stable working environment and strict control of factors affecting the plating process. Below is the basic process when using Auruna 570 gold plating solution:
5.1 Surface Preparation
The first and most crucial step in the gold plating process is preparing the product’s surface. A clean surface ensures good adhesion and even coverage of the gold plating, improving the durability and aesthetics of the coating.
5.2 Preparing the Plating Solution
The plating solution must be prepared in the correct proportions to ensure the right concentration of chemicals for different product types and plating methods. Factors such as temperature, pH, and other elements need to be checked carefully. Proper control and adjustment of these factors will ensure that the plating solution remains in an ideal state, producing high-quality gold plating.
5.3 Plating Process
Once the solution is prepared, the gold plating process can begin. Depending on the requirements and design of the product, manufacturers can choose between two plating methods:
- Rack Plating: The product is hung on racks and immersed in the plating solution. The voltage is adjusted to ensure the gold plating is applied evenly and reaches the required thickness. This method is typically used for products with simple shapes, easy to hang, and large plating areas.
- Barrel Plating: The product is placed in a rotating barrel, and the plating solution is sprayed onto the product’s surface while the barrel rotates. This method ensures even gold plating on complex surfaces with difficult shapes.
Factors such as plating time, voltage, current, and temperature must be strictly controlled to ensure the coating’s thickness, adhesion, and brightness meet the desired specifications.
5.4 Quality Inspection and Evaluation
After gold plating, the product must undergo a quality check to ensure the coating meets the required technical standards. Key factors to inspect include:
- Plating Thickness: The coating must be evenly applied, not too thin to risk peeling, nor too thick to avoid cracking or aesthetic issues.
- Adhesion: To ensure the plating doesn’t peel off during use, adhesion testing should be conducted using methods like tape tests or compression tests.
- Brightness: The gold plating should have an even shine without tarnishing. Products should be inspected under light to evaluate surface reflection and overall finish.
Accurate inspection and evaluation will help detect any defects early and adjust the process if necessary.
Conclusion
Auruna 570 gold plating solution is an excellent choice for businesses looking to create aesthetically appealing, durable, and cost-effective gold-plated products. With its outstanding benefits, such as gold conservation, ease of use, simple maintenance, and RoHS compliance, Auruna 570 has become the preferred choice for many jewelry, watch, and luxury product manufacturers. If you are looking for a supplier of Auruna 570, PMAC is the ideal choice. Contact us now for detailed guidance.