Trivia: "What are pits and pinholes?"

There is a defect in chrome plating known as pits and pinholes, which are holes that form in the plating film. I will explain these pits and pinholes.

Have you ever heard the terms "pit" and "pinhole"? Both refer to defects where holes form on the surface of a plating film, but what is the difference between them? First, a pit refers to a hole that does not reach the base material. In contrast, a pinhole refers to a hole that does reach the base material. Pits are less likely to lead to immediate corrosion, while pinholes allow corrosive factors to enter through the hole, increasing the risk of corrosion and rust formation in the base material. To explain it simply, this is how it works. Next, why do pits and pinholes occur? The causes can be broadly divided into two types: - Issues during plating, such as debris adhesion or hydrogen gas bubbles. - Defects in the material itself, such as holes or inclusions. The first type is largely influenced by the plating contractor's skills and the management of the plating solution, so choosing a good plating contractor can help reduce these issues. On the other hand, for material-related issues, it is important to select high-quality materials.

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