The Benefits of Gold Plating

The metal plating system takes a conductive surface and coats it in a type of metal. There are gold plating, silver plating, and rhodium plating systems and more. Plating is not a new technique; it has been used for hundreds of years. In the age of technology, plating is more important than ever.

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Plating is used in the following ways:

• To make a cheaper metal look better. For example, you can take a piece of jewelry made of an alloy of less-expensive metals and coat it with lustrous 18k gold plating. The base metal is cheap, and you use such a small amount of the precious metal for the plating that the price stays low. However, the final product takes on the look of a solid gold piece of jewelry.
• To inhibit corrosion. If a product is going to be exposed to the elements, you can build it from a low-price metal alloy, then plate it with a type of metal that is not susceptible to rusting from moisture, such as 24k gold plating.
• To allow paint to stick to a surface. Paint bonds to certain types of metal better than others. You can plate products with metals that encourage paint adhesion.

Plating is also used to enhance solderability, improve conductivity (in electrical devices), make something more durable, improve reflectivity, and more.

Gold is frequently used for plating because of its inherent properties. Here are some reasons why gold is often the metal of choice for plating projects:

• Gold doesn&#;t oxidize. Oxygen contributes heavily to the corrosion of many metals, but gold does not oxidize. It is the least-reactive of all metals. That means that it is impervious to moisture and high temperatures. Gold will hold up well in many environments and will not melt when subjected to high heat.
• Gold has excellent electrical conductivity, meaning that it facilitates the transmission of electrical current. This makes it a vital metal for the electronics industry. When components heat up due to the passage of electrical current, some metals will melt. Gold is unaffected, however, due to its heat-resistant properties.
• Gold is malleable. As a result, this metal can be easily deposited in very thin layers over metals such as nickel. Gold plating makes substrate metals more durable.

GoldPlating.com offers all-inclusive kits that include gold plating solutions and supplies to help with all of your metal plating needs.

Gold in its so many forms such as earrings, pendants, necklaces, or anklets never lost its value through time. In fact, its value simply appraises through time. However, gold, in nature is malleable and can be easily deformed especially when a force is used against it. However, because of gold plating solutions, such disadvantages are corrected.

01 What are the aliases of gold plating and sinking gold?

Gold plating: hard gold, electric gold

Immersion gold: soft gold, chemical gold

02 The origin of the alias

Gold plating: through electroplating, the gold particles are attached to the board, so it is called electro-gold, because of its strong adhesion, it is also called hard gold, and the gold fingers of the memory stick are hard gold, which is wear-resistant.

Immersion gold: Through chemical reactions, gold particles crystallize and attach to the pads of the PCB board. Because of weak adhesion, it is also called soft gold.

03 The impact of gold plating and immersion gold on the patch

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Gold plating: Do it before the solder mask, the green oil may not be cleaned cleanly, and it is not easy to tin. Immersion gold: After doing the solder mask, the patch is easy to tin.

04 Different processes and procedures

Gold plating: Do this process before solder masking, because gold plating requires two electrodes, one is the PCB board, and the other is the cylinder tank. If the PCB board is finished with solder masking, it will not be able to conduct electricity, and it will not be able to pass through the gold.

Immersion gold: After the solder mask is done, like immersion tin, chemical methods, gold will be attached to the place where there is copper leakage.

05 The impact of Zhenjin and immersion gold on electrical appliances

Gold plating: Before gold plating, a layer of nickel needs to be plated, and then a layer of gold is plated. The metal layer is copper-nickel-gold, because nickel is magnetic and has an effect on shielding electromagnetic waves.

Immersion gold: Immersion gold directly on the copper skin, the metal layer is copper gold, no nickel, no magnetic shielding.

06 Identification of gold plating and immersion gold

The gold plating process is magnetic because it contains nickel. When identifying gold plating or immersion gold, you can use a magnet to attract the PCB board. If it is attractive, it is gold plating, and if it is not attractive, it is immersion gold. In addition, the color is also different. The immersion gold is golden yellow. Because the gold surface is large, the gold plating is generally very thin, which is more than white. Of course, there are also thick plating, which is also golden yellow. At this time, it is difficult to distinguish the pads.

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Flash Gold

The word flash gold comes from the English Flash, which means fast gold plating. In fact, it is the "pre-gold plating" process of electroplating hard gold. It uses a large current and a liquid bath with a thicker gold content to form on the surface of the nickel layer first. A finer density but thinner gold plating layer facilitates the subsequent electroplating of gold-nickel or gold-cobalt alloys.

Some manufacturers see that gold-plated PCBs can also be made in this way, and the price is cheap and the time is shortened, so some people sell such flash gold PCBs.

Because flash gold lacks the subsequent electroplating process, its cost is much cheaper than real electroplating gold, but because its gold layer is very thin, it generally cannot effectively cover all the nickel layer under the gold layer, so it is also relatively expensive. It is easy to cause the problem of oxidation after the circuit board is stored for a long time, which in turn affects the solderability.

Important reminder: choose the surface treatment method reasonably according to your product characteristics. If your product is an industrial grade product, if you want to guarantee the quality of your product, you must not use flash gold to save money!

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