Eco Silver

Eco-Silver

Eco-Silver Series
(A Series of Cyanide-Free Silver-Plating Solutions)

1. Introduction

(1) Eco-Silver series lineup

Product name Purity Ag concentration (g/L) Current density range (A/d㎡) Bath temperature (˚C) pH Coating appearance Hardness (HV) Features Plating method Applications
Eco-Silver SB106T AG: 99 Sb and Se free 10 0.2 to 0.8 30 5.7 Matte 100 Resistance to discoloration Thick plating suitability Rack Decorations Electronic parts
Eco-Silver SBRCT AG: 99 Se free 10 0.2 to 1.5 30 5.7 Semi-glossy 120 to 150 Heat resistance Rack Barrel Electronic parts
Eco-Silver B36T AG: 99 Sb and Se free 25 0.5 to 2.0 30 6.0 Glossy 150 Glossiness Rack Barrel Decorations
Eco-Silver SB56T AG: 99 Sb and Se free 40 0.5 to 4.0 40 6.0 Semi-glossy 100 to 150 Workability (Current density range) Rack Barrel Hoop Electronic parts

*”Silver plates” are used as anodes, and “Cu” is used as the material for all appropriate cases

Several types of plating solutions are available to suit your application Anti-replacement and anti-discoloration agents are also available. Please contact us for details

1. Introduction

(2) Additives in the Eco-Silver series

Silver supplementation solution Conductive solution Brightener Hardener pH increaser
Eco-Silver SB106T ○ ○ – – –
Eco-Silver SBRCT ○ ○ – ○ –
Eco-Silver B36T ○ ○ ○ – –
Eco-Silver SB56T ○ ○ ○ – ○
Remarks Used when the silver concentration decreases Used at all times Used at all times Used at all times Used when the pH decreases

2. Features of the Eco-Silver Series

(1) Benefits of not using cyanide

Item Content
Exhaust gas No need of cyanide gas washing towers
(No cyanide gas is generated)
Wastewater treatment No need for wastewater treatment facilities for cyanide decomposition
Safety Contains no toxins such as cyan compounds, etc.
No physical effects, such as cyanide toxicity, etc.
Liquid manageability Complex management is unnecessary because there are no volatile substances such as free cyanide, etc.
The Eco-Silver series has very high liquid stability

2. Features of the Eco-Silver Series

(2) Hardness and glossiness

2. Features of the Eco-Silver Series

(3) Heat resistance

Plating conditions: Ag10 μm/Ni/Cu
Hardness and appearance after heat treatment at 150°C x 500 Hr

>

Plating solution Hardness reduction Discoloration
Eco-Silver SBRC No No
Hard cyan Ag coating (typical) Yes Yes
Hard cyan Ag coating (low Sb) No Yes

With the Eco-Silver SBRC, there was no discoloration nor a reduction in hardness even in an environment where it was exposed to high temperatures for a long time

3. Example of Plating Process

Plating process (for Cu-based materials)

4. Summary

Benefits to users

· Reduced stress on the environment
=> The safety of workers is ensured
=> Environmental pollution risks due to leakage of plating solutions areeliminated
· Coating hardness and heat resistance with the same or higher level than thatof cyanide
=> In particular, the heat resistance that the Eco-Silver series boasts duringextended hours of processing is a property not found in cyanide baths
· The required hardness and appearance can be selected from the lineup
=> A choice appearances which include “matte,” “semi-glossy,” and “glossy” are available

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