A protective film is formed on the silver surface, which maintains the luster of the silver for a long time. The protective film has good solderability and low electrical contact resistance.
AC-410 is a silver discoloration inhibitor designed to have stronger resistance in discoloration tests in potassium sulfide solution. Among the AC series, AC-410 provides the highest discoloration prevention effect in potassium sulfide solution. It is a silver discoloration inhibitor used to protect the surfaces of electrical and electronic components, as well as jewelry and artifacts, from various harmful environments. The environments affecting silver and silver-plated surfaces are diverse, but particularly in atmospheres containing sulfur gas or in liquids containing sulfides, sulfides form on the silver surface, causing it to appear black. In electronic components, this leads to an increase in electrical resistance and a decrease in conductivity. Silver discoloration inhibitor AC410 forms a strong film on the silver surface, protecting it from sulfide and oxidation. Additionally, the protective film has good solderability and low electrical contact resistance. Being water-based and neutral, it is also easy to treat for wastewater disposal.
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basic information
■ There is no flammability or combustibility due to the water-based silver discoloration inhibitor. ■ After immersing silver products in AC-410 and rinsing with water, a strong protective film is formed on the silver surface through drying. ■ It has good solderability, making it widely used in various electrical and electronic components. ■ Properties Appearance: Colorless transparent liquid Specific gravity: 1.02 ± 0.05 (25°C) Solvent: Water pH: 6.0 ± 0.5 (concentrate) Dilution rate: 10-25% ■ Usage Pour the concentrate into a stainless steel or plastic container, immerse the rinsed silver and silver-plated items for 1-2 minutes, then rinse with water and dry with air or warm air. Treatment temperature: Room temperature to 60°C (optimal temperature 50-60°C) - Silver material → AGR-100 → rinse → AC-70 treatment → rinse → dry * A rust-proof film will not form if the surface is not clean. - Silver plating → rinse → AC-70 treatment → rinse → dry ■ Packaging: 18 kg per container
Price range
P2
Delivery Time
P3
Applications/Examples of results
There are many achievements in rust prevention and discoloration prevention of silver products, such as electrical and electronic components like connectors and LEDs for heavy electrical equipment.
Detailed information
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Silver tarnish test This is the resistance test result of the silver tarnish inhibitor AC-410 against potassium sulfide aqueous solution. AC-410 shows strong resistance to immersion in a 2% potassium sulfide aqueous solution, which is the European standard.
Line up（1）
| Model number | overview |
|---|---|
| AC-410 | ＜New Product＞This is a water-soluble silver tarnish inhibitor. It forms a uniform tarnish prevention film on the silver surface, preventing tarnishing. It can be used over a wide pH range (4.0 to 10.0). The formation of the tarnish prevention film does not affect contact resistance. Being neutral, no neutralization treatment or other operations are required upon disposal. |
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Company information
Asahi Co., Ltd. has been in operation since 1958, and we have always listened to our customers' requests and focused on researching and developing products that meet their needs. So far, we have released numerous products, including cleaning agents for kitchens, car shampoos and waxes for car wash machines, as well as copper and silver tarnish prevention agents. In recent years, there has been a growing demand for environmentally friendly chemicals, leading to an increase in requests for degreasers, cleaning agents, tarnish prevention agents for semiconductors, and high heat-resistant tarnish prevention agents that do not use strong acids or strong alkalis. Our products have traditionally been developed in response to such voices. Moving forward, we will continue to listen to various feedback and develop new products.