SterlingShield AS-56(X)

Introduction

SterlingShield AS-56(X) is a water-soluble silver protective agent that can prevent surface oxidation of chemical silver plating. It is especially suitable for silver surface anti-discoloration. The protective film formed by SterlingShield AS-56(X) is colorless and transparent, which can greatly improve the anti-corrosion ability of the silver surface. It does not contain chromate, so it will not cause pollution to the environment. It is also economical to use.
The surface of a workpiece treated with SterlingShield AS-56(X) needs to be washed three times with water. The SterlingShield AS-56(X) protective film can be removed using CoaTech’s stripping agent. Subsequent electroplating operation can then be performed.
The main function of SterlingShield AS-56(X) is to modify the surface tension of silver to be greater than 38 dyn/cm2. It can be combined with epoxy resin and other organic coatings.

Operating Conditions

Operating Method

The immersion of the workpiece in the SterlingShield AS-56(X) solution is the final step in the process before drying. After the SterlingShield AS-56(X) treatment, the workpiece needs to be washed with pure water three times. The workpiece must be cleaned, moistened, and be free of oil stains before entering the SterlingShield AS-56(X) solution. Since the SterlingShield AS-56(X) protective agent has no cleaning effect, a protective film will not form on surfaces with stains.

Equipment

The SterlingShield AS-56(X) protective agent solution must be stored in stainless steel, fiberglass, plastic, PVC lined steel, PE, or PP tanks. If a steel groove is used, it will rust and affect the formation of the SterlingShield AS-56(X) protective film. The heater can be made of quartz, stainless steel, or Teflon material. It is recommended to equip the production line with an exhaust system.

Control and Maintenance

The SterlingShield AS-56(X) protective agent generally does not require a predetermined solution change per liter of processed area. If the workpiece is prone to oxidation, this may indicate that the effective components of the solution are low or contaminated, and thus should be replaced. An analytical method (UV analysis) can be utilized if necessary.

Waste Liquid Treatment

SterlingShield AS-56(X) contains non-ionic surfactants dissolved in water and organic compounds in water, and it contains metals after use. Discharge of waste liquid must be treated according to local standards.

Disclaimer

All proposals or suggestions regarding our company's products in this manual are based on experiments and data that our company trusts. Due to the inability to control the actual operations of other practitioners, our company cannot guarantee or be responsible for any adverse consequences.