丸長鍍金 List of Products and Services

We offer "masking jig production for painting." It allows for masking in areas that are difficult with masking tape, significantly reducing work time and achieving labor-saving and efficiency improvements. Additionally, it reduces the defect rate and enables the supply of products with stable quality. 【Features】 ■ Allows for masking in areas that are difficult with masking tape ■ Significantly reduces work time ■ Achieves labor-saving and efficiency improvements ■ Reduces defect rate and supplies products with stable quality *For more details, please download the PDF or feel free to contact us.

• jig

Marunaga Gold Co., Ltd. conducts polishing treatments. Buff polishing gives shine to various materials, while electrolytic polishing uses anodic electrolysis to provide luster to stainless steel. Please feel free to contact us if you have any requests. 【Features】 ■ Buff Polishing - Polishes various materials and gives shine ■ Electrolytic Polishing Treatment - Uses anodic electrolysis to provide luster to stainless steel *For more details, please download the PDF or feel free to contact us.

• Surface treatment contract service

Aluminum has a soft surface that is prone to scratches, and it is possible to impart hardness to the surface by applying electroless nickel plating. By performing heat treatment, a higher hardness coating can be obtained. Not only hardness, but also by applying tin plating, functions such as solderability can be achieved. Additionally, it is possible to impart different properties by applying other coatings. 【Features】 ■ Wear resistance ■ Dimensional accuracy ■ Heat resistance ■ Chemical resistance ■ Resistance characteristics *For more details, please download the PDF or feel free to contact us.

• Processing Contract

"Electroless nickel plating" is a type of plating for iron-based materials that creates a coating through chemical reduction without using electricity. As a result, a more uniform coating can be obtained compared to electroplating, and it is possible to deposit plating on the inner diameter of pipes and complex-shaped products. Our company has established pre-treatment processes such as nickel strike, allowing plating on materials other than iron, including SUS, brass, and copper products. 【Features】 ■ Wear resistance ■ Dimensional accuracy ■ Heat resistance ■ Chemical resistance ■ Resistance characteristics *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce our processing of "hard chrome plating." Hard chrome has a very high hardness of Hv800 to 1000 or more among plating types, and it excels in wear resistance. By performing feathering before and after plating, it is possible to achieve good lubrication performance. Additionally, thick plating is possible, and treatments of over 100μm may be performed for buildup. Masking for partial plating is also possible. 【Features】 ■ Wear resistance ■ Hardness ■ Buildup manufacturing ■ Porosity *For more details, please download the PDF or feel free to contact us.

• Processing Contract

Our company conducts stripping-type electroforming in a nickel sulfamate bath and both stripping-type and thick-type electroforming in a cyanide silver bath. There are two types of electroforming: stripping-type and thick-type. Stripping-type electroforming involves depositing metal to the required thickness on the original model through the electrolysis of the plating solution, and then separating it from the original model, resulting in an electroform that has a shape completely opposite to that of the original model, while maintaining the same dimensional accuracy. In contrast, thick-type electroforming involves directly electroplating the base metal for an extended period to deposit a thicker plating film. 【Features】 ■ Transferability ■ Realism ■ Replication *For more details, please download the PDF or feel free to contact us.

• Processing Contract

"Tinning" is the process of coating a metal surface with tin. This coating is used for various purposes, such as improving corrosion resistance, weldability, appearance, or conductivity. It is widely used in various fields, including food cans, electronic components, industrial products, and building materials. Particularly in food and beverage containers, tinning helps prevent reactions between the internal metal surface and the food, ensuring safety. 【Features】 ■ Solderability ■ Improved corrosion resistance and weldability ■ Enhanced appearance ■ Increased conductivity *For more details, please download the PDF or feel free to contact us.

• Processing Contract

"Electroless tin plating (inner surface)" is a plating process that suppresses leaching by providing a uniform tin coating on the inner surface of complex copper pipes, and it excels in resistance to pitting and crevice corrosion. Due to the non-toxic nature of tin and its high thermal conductivity, tin is also used in items like tumblers, keeping cold drinks cold and hot drinks hot. Our products are used in everyday items such as water heaters. 【Features】 ■ Pitting resistance ■ Crevice corrosion resistance ■ Thermal conductivity *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce our processing of "Zinc Plating and Trivalent Chromate Treatment (White and Black)." The corrosion protection effect of zinc plating is called "sacrificial protection," which utilizes the property that zinc corrodes before iron, thereby protecting the product from rust. Additionally, by applying chromate treatment, we can prevent the occurrence of white rust on the zinc plating film. 【Features】 ■ Rust resistance (Salt spray test red rust for over 240 hours) ■ By applying chromate treatment, it is possible to prevent the occurrence of white rust on the zinc plating film. *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce our processing of "Zinc-Nickel Alloy Plating and Trivalent Chromate Treatment (White)." Zinc-nickel alloy plating possesses excellent corrosion resistance by incorporating 5-8% nickel into zinc plating. Additionally, in salt spray tests, zinc-nickel alloy shows approximately four times the corrosion resistance compared to zinc plating before red rust occurs. This corrosion resistance makes it widely used in important automotive components and cold climate specifications. 【Features】 ■ Contains 5-8% nickel in zinc plating ■ High rust prevention (Salt spray test: over 1000 hours before red rust) *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce our processing of "Aluminum Zinc-Nickel Alloy Plating." Aluminum has high corrosion resistance due to its protective oxide film. However, it is vulnerable to acids and alkalis, and if damaged by chemical effects, corrosion can progress. By applying zinc-nickel plating treatment, a zinc and nickel alloy forms on the surface, providing sacrificial protection and achieving high corrosion resistance. 【Features】 ■ Corrosion resistance ■ By applying zinc-nickel plating treatment, a zinc and nickel alloy provides sacrificial protection on the surface. *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce our "Nickel-Chrome Plating" processing. This is a representative of decorative plating and is commonly seen on items such as faucets. In addition to its decorative qualities, corrosion resistance is also emphasized. In automotive parts, double nickel, which features semi-gloss nickel and glossy nickel topped with chrome, is mainstream and is used in automotive parts, motorcycles, musical instruments, gas appliances, plumbing fixtures, product shelves, and more. 【Features】 ■ Decorative quality ■ Rust prevention ■ Wear resistance ■ Reflectivity ■ Weather resistance ■ Heat reflectivity *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce the processing of "Glossy Nickel Plating/Satin Nickel Plating" that our company performs. "Glossy Nickel Plating" has a uniform, mirror-like shine and high wear and corrosion resistance, making it widely used in various applications such as decorative items, automotive parts, household goods, and industrial equipment. "Satin Nickel Plating" is achieved by adding non-conductive fine particles to the nickel plating bath, allowing the fine particles to embed within the deposited nickel, which diffuses the light and results in a matte surface with reduced gloss. 【Features (Common)】 ■ Decorative ■ Rust prevention ■ Wear resistance *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce "Electroless Nickel Plating with Zinc-Nickel Plating," a technology held by Marunaga Co., Ltd. After performing electroless nickel plating treatment on the entire surface, including the interiors of pipes and recessed areas, we apply zinc-nickel alloy plating, which has superior corrosion resistance compared to zinc plating. The characteristic of this technology is that the plated products can be used under harsh conditions. Recently, the number of companies adopting this technology has been increasing, making it a highly sought-after plating treatment. 【Features】 ■ High corrosion resistance ■ Plated products can be used under harsh conditions ■ Highly sought-after plating treatment *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce our technology, "Plating on the inner diameter of pipes," developed by Marunaga Co., Ltd. Generally, plating involves immersing the product in a plating solution contained in a processing tank. However, our developed technology allows for plating without immersing the product in the plating solution, enabling plating treatment specifically on the inner diameter of pipes. As a result, this technology is utilized for plating the inner diameters of fuel pipes and heat exchangers. Please feel free to contact us. 【Features】 ■ Plating is deposited on the inner diameter without immersion in the plating solution. ■ This technology is adopted for plating the inner diameters of fuel pipes and heat exchangers. *For more details, please download the PDF or feel free to contact us.

• Processing Contract

We would like to introduce our proprietary technology at Marunaga Coating Co., Ltd., which is "direct plating on stainless steel." The surface of stainless steel tends to form an oxide film, and typically, a strike nickel plating is an essential process. Without this, good adhesion cannot be achieved when performing various other platings. However, due to recent issues related to the working environment, such as the gradual shift towards "nickel-free" processes, our company has established a special technology that allows for direct silver plating on stainless steel without the need for strike nickel plating. 【Features】 ■ Nickel-free ■ The silver plating bath (manufactured by Yamato Kasei) is non-cyanide type ■ The silver plating provides added value to stainless steel materials by imparting conductivity, reflectivity, solderability, antibacterial properties, and more. *For more details, please download the PDF or feel free to contact us.

• Processing Contract

Our company analyzes surfaces using various devices to solve all kinds of problems and contribute to technological development. We identify issues from all analyses and connect them to countermeasures, evaluating physical properties through shape measurement and film analysis. We also conduct quantitative analysis of elements in films and environmentally regulated substances. 【Products and Services】 ■Problem Solving ■Physical Property Evaluation ■Component Analysis *For more details, please download the PDF or feel free to contact us.

• Analytical Equipment and Devices