1. The hardness and wear resistance of electroplated gold are better than those of chemical gold plating. The solution is easy to maintain and does not require tank washing. It is suitable for various welding methods of surface mount. The main drawback is that the thickness is uneven and the plated part requires electrical connection.
2. The advantage of chemical gold plating is that the parts to be plated do not require electrical connections, and the coating is uniform, making it more suitable for surface mounting. The disadvantage is that the solution is difficult to maintain, and the chemical nickel used for backing needs to be washed regularly to remove the nickel deposits on the surface of the tank, resulting in discontinuous production. The operating cost is also relatively high. The hardness and wear resistance of the chemical gold plating layer are inferior to those of electroplating hard gold, and the thickness that can be achieved is limited, making it unsuitable for certain surface mount welding methods. In order to make up for this disadvantage, chemical nickel palladium plating can also be used instead of chemical nickel gold, which is suitable for various welding methods of surface mount.