三价和六价锌P之间的区别lating

Thekey differencebetween trivalent and hexavalent zinc plating is that thetrivalent zinc plating process has a high efficiency with a uniform distribution than the hexavalent zinc plating process.

Zinc plating is a common process of protecting a wide range of materials. It can act as a sacrificing coat. For example, if we dozincplating on铁如果将涂层刮擦在某个地方，则锌充当保护内铁材料的牺牲电极。有两种形式的锌电镀过程。三价电镀和六价电镀过程。其中，三价锌电镀是最新的。

1.Overview and Key Difference
2.What is Trivalent Zinc Plating
3.What is Hexavalent Zinc Plating
4.Side by Side Comparison – Trivalent vs Hexavalent Zinc Plating in Tabular Form
5.概括

What is Trivalent Zinc Plating?

Trivalent zinc plating is a form of finishing method that uses chromium sulfate or chromium chloride as the main ingredient. Therefore, it is highly environmentally friendly. The main ingredients mentioned previously are less toxic, and we call this finishing a decorative chrome plating. It has most of the characteristics of hexavalent zinc plating. It provides materials with the resistance to scratch and corrosion. Moreover, it is available in many colors.

The advantages of this plating include the ability to create highly protective and bright deposits at very high current densities, extremely low stressed and blistered free deposits, excellent covering power, uniformity, environmental friendly plating, etc.

However, it is difficult to control this process and the chemicals used are highly expensive. Another disadvantage is that the colors are not identical. More importantly, the coating needs to be applied at high temperatures around 30-60 ◦C.

What is Hexavalent Zinc Plating?

Hexavalent zinc plating is an older version of zinc plating. The most common name for this method is chrome plating. We can use this process for decorative purposes and functional finishes. We can achieve this finish via submerging the substrate material in a bath of chromium trioxide (CrO3). This bath contains sulfuric acid as well. This plating provides the materials with corrosion and wears resistance.

但是，由于其缺点，该方法现在被三价方法取代。更重要的是，此过程会产生一些危险的废物产品。例如：铬酸铅，硫酸钡。此外，六价铬是致癌物。因此，此过程对环境也有害。

What is the Difference Between Trivalent and Hexavalent Zinc Plating?

Trivalent zinc plating is the latest version of zinc plating. The ingredients that we use for this process are chromium sulfate or chromium chloride. Importantly, it creates a more uniform coat and is an eco-friendly process. This is the main difference between trivalent and hexavalent zinc plating. On the other hand, hexavalent zinc plating is the older version of zinc plating. The ingredients that we use for this process are chromium trioxide and sulfuric acid. It creates a less uniform coat and is harmful to the environment. However, this process is less expensive, comparatively.

摘要 - 三价与六价锌电镀

The two major finishes of zinc plating are trivalent and hexavalent zinc plating. The key difference between trivalent and hexavalent zinc plating is that the trivalent zinc plating process has a high efficiency with a uniform distribution than the hexavalent zinc plating process.

Reference:

1. Wardell, Marcee. “Hexavalent vs. Trivalent Chrome Plating.” Electro Chemical Finishing, 30 May 2017.Available here
2. “Zinc Trivalent Plating.” Cadillac Plating.Available here