What are Rust Preventives? | Type Comparison and How to Choose the Right One for Metalworking in Factories

What are Rust Preventives? | Type Comparison and How to Choose the Right One for Metalworking in Factories
Rust preventives are indispensable tools in metal processing factories, extending the lifespan of parts and preventing damage during storage and transportation. Various types are available, including oil-based, water-based, wax-based, and VCI, requiring optimal selection depending on the type of metal and manufacturing process. This article explains a comparison of rust preventive types, selection points, and actual use cases.
■ What are Rust Preventives?
Rust preventives are chemical agents applied to metal surfaces to prevent oxidation reactions with oxygen and moisture, thereby suppressing the occurrence of rust. Their application extends to all post-manufacturing processes, such as temporary storage after cleaning, transportation, and waiting for assembly.
■ Main Causes of Rust
・ Humidity and water vapor in warehouses
・ Oxygen in the air, steam containing salt
・ Fingerprints, oil, residual dust
・ Condensation due to rapid temperature changes
・ Shocks and vibrations during transportation
■ Types of Rust Preventives
・ Oil-Based: Forms a thick film, suitable for long-term storage
・ Volatile (VCI): Protects the entire interior of the packaging with vaporized rust-inhibiting components
・ Water-Based: Easy to handle, high cleanability, ideal for continuous line use
・ Wax-Based: Suitable for outdoor storage and long-distance transportation
■ Effective Selection and Usage Methods
Points for selecting rust preventives:
・ Type of metal (e.g., iron, copper, aluminum)
・ Purpose (short-term storage, transportation, long-term storage)
・ Compatibility with subsequent processes (e.g., impact on painting or assembly)
・ Ease of cleaning
・ Environmental conditions during storage and transportation (e.g., humidity, temperature changes, transportation distance)
■ Examples of Use in Factories
・ Automotive parts awaiting shipment or assembly
・ Metal parts in short-term warehouse storage
・ Machinery and equipment for export
・ Molds and tools requiring long-term storage
Especially in factories with high-mix, low-volume production, rust preventives are effectively utilized for storing parts for a certain period.
■ Related Product Introduction (Practical Example)
Water-Based Rust Preventive VERZONE AF-22 (Manufactured by Daiwa Fine Chemicals (Thailand) Co., Ltd.)
VERZONE AF-22 is a water-based rust preventive suitable for a wide range of metals, including copper and zinc. It features high humidity resistance, low stickiness, and an environmentally conscious design, allowing for safe use on surface-treated and processed parts. It cleanly and efficiently protects metals and minimizes impact on subsequent processes.
■ You can download the PDF for details. Please feel free to contact us if you have any questions.
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DAIWA FINE CHEMICALS (THAILAND) CO., LTD.

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Heavy electric machinery / Electronic parts / Transportation equipment

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Corrosion Inhibitor / Copper Plating Solution / Non-Cyanide Silver Plating Solution

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