Хромиальное покрытие стержней из нержавеющей стали и других процессов покрытия сплава
Введение
Chromium plating is an electroplating method used for metal surface treatment.
Through this process, a special surface layer is formed on the metal.
This new layer provides better corrosion resistance, wear resistance, украшение, or other functions.
Таким образом, stainless steel bars are often treated using this method.
In industrial products, “chromium-plated bars” usually refer to bars treated by electroplating.
What is Electroplating?
Electroplating is done by using electrolysis.
During the process, a thin layer of another metal or alloy is plated onto the metal surface.
Common types include:
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Gold plating
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Silver plating
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Cadmium plating
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Zinc plating
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Chromium plating
Таким образом, electroplating helps improve both the look and performance of metals.
Chromium Plating Process
Many formulas are used for chromium plating.
The most common one involves an aqueous solution of chromium anhydride.
Additional additives such as:
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Fluorosilicic acid
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Strontium fluorosilicate
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Potassium fluorosilicate
are often added.
Different mixtures create solutions like:
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Composite chromium plating solution
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Fast chromium plating solution
Таким образом, the solution depends on the specific need.
Electroplating Setup
A special plating tank is required.
The tank holds the chromium electrolyte.
The system is connected to a low-voltage DC power supply.
Lead is usually used as the anode.
The stainless steel bars or other parts must be:
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Ground or polished
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Degreased
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Pickled
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Rinsed with clean water
After preparation, parts are hung on special hangers.
These hangers are connected to the cathode.
When the current flows, chromium ions are reduced onto the surface.
Таким образом, a chrome coating is formed.
Types of Chrome Plating
Different types of chrome plating serve different purposes:
| Type of Chrome Plating | Main Purpose |
|---|---|
| Hard Chrome Plating | Wear resistance, твердость, коррозия |
| Milky White Chrome Plating | Special surface appearance |
| Loose Pore Chrome Plating | Industrial use, improved oil storage |
| Black Chrome Plating | Decorative or special industrial use |
| Protective-Decorative Chrome Plating | Corrosion and decorative finish |
Таким образом, the choice depends on what the product needs to achieve.
Chrome Plating for Stainless Steel Bars
For machinery parts, hard chrome plating is commonly used.
Its main purposes include:
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Increasing surface hardness
-
Improving wear resistance
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Enhancing corrosion resistance
Таким образом, stainless steel bars become much stronger after hard chrome plating.
Quick Form: Chromium Plating of Бары из Нержавеющей Стали
| Элемент | Details |
|---|---|
| Purpose of Plating | Improve corrosion, твердость, and look |
| Common Electroplating Types | Золото, silver, cadmium, zinc, хром |
| Electrolyte Base | Chromium anhydride with additives |
| Needed Pre-Treatments | Полировка, degreasing, маринование |
| Typical Power Source | Low-voltage DC with lead anode |
| Types of Chrome Plating | Hard, Milky White, Loose Pore, Черный, Декоративный |
| Use for Machinery Bars | Hard chrome plating for durability |