AgAuShield Plus

Introduction

AgAuShield Plus is a water base solution which provides excellent protection for silver/silver alloy and gold/gold alloy surfaces. Tarnish resistance, anti-sulfide ability, and wear resistance are all improved dramatically after coating with the AgAuShield Plus protective agent.

Properties

● An ultra-thin protection film is formed after the workpieces are immersed in the AgAuShield Plus solution at 50ºC for 0.5 to 5.0 minutes.
● There is no negative effect on contact resistance and solderability.
● Wear resistance and tarnish resistance is improved dramatically.
● A short heat treatment of 200ºC will not adversely affect the protective properties of the ultra-thin film.
● Treatment with AgAuShield Plus does not cause water stains.
● AgAuShield Plus has a long bath life.

Composition of Plating Solution

AgAuShield Plus is dissolved in heated water (50ºC). It is then ready to use.

Operating Conditions

Note: A longer immersion time will result in superior protection.

Solution Maintainance

DI water can be added to compensate for water evaporation. The reactive compound concentration needs to be maintained in 100%. Please see the “AgAuShield Plus Working Solution Maintenance and Addition” section for more details.

Preparation and Operation of Solution

Note: Before using AgAuShield Plus, shake the AgAuShield Plus for 1 minute at room temperature (below 25ºC).
1. Clean the container
2. Add 75% volume DI water and heat it to a temperature of 50 to 55ºC
3. Add AgAuShield Plus, and stir to form a homogeneous solution
4. Add water to the desired level, and stir the working solution for at least 1 minute
5. Adjust the working temperature to 50 to 55ºC

Equipment

Container: Stainless steel or PP
Ventilation: Required
Heat: PTFE

AgAuShield Plus Working Solution Maintenance and Addition

A. Note: Since the working solution is a gel solution, the particle size greatly affects the analysis results. This method is not very accurate for analyzing an aged working bath.
1． Procedure:
a） Put 20mL of the AgAuShield Plus working solution in a 250mL V flask
b） Add 20mL 0.1N Iodine
c） Stir for 10 minutes
d） Use 0.1N NaS2O3 to titrate to light yellow
e） Add 1mL 1% starch indicator
f） Continue to use 0.1N NaS2O3 to titrate to colorless (record the total V)
2． Calculation: AgAuShield Plus % = 400 - 20V

B. Troubleshooting