7 Very Practical Methods to Prevent Rust

Table of Contents:

① Causes of Metal Rust

② Methods for Preventing Rust on Goods

③ How to Inspect Rust Prevention Results?

Metal products are prone to rusting during use or transportation. Why do they rust so easily? What methods can be used to prevent rust on metal products? As a professional manufacturer of rust prevention products, CVCI offers professional advice and suggestions that we hope will be helpful in addressing your metal product rust issues.

Causes of Metal Rust

Rust on goods is primarily caused by electrochemical corrosion between the metal and moisture and oxygen in the environment. Humidity is the primary cause. When relative humidity exceeds 60%, a water film easily forms on the metal surface, dissolving carbon dioxide, sulfur dioxide, or salt in the air (especially in coastal areas or during sea transport), forming an electrolyte solution that greatly accelerates corrosion. Additionally, scratches and damage to protective coatings (such as paint and plating) during transportation, the absence of desiccant in packaging, and condensation caused by extreme temperature fluctuations in storage can all contribute to rust.

Ways to Prevent Rust:

1. Galvanizing

Galvanizing is one of the most effective ways to prevent rust on metal products. The metal surface is coated with zinc. Zinc is a highly reactive metal that acts as a sacrificial anode, replacing iron or steel to rust. This prevents rust. Galvanizing is commonly used on products such as pipes, roofing, and fencing. However, this process is relatively complex and can alter the metal's appearance, making it a relatively limited method.

2. Powder Coating

Powder coating is a common method for preventing rust on metal products. A dry powder is sprayed onto the metal surface and then baked at high temperatures. The intense heat melts the powder and forms a protective layer on the metal surface. This type of powder coating is commonly used on outdoor furniture, cars, and bicycles. However, this form of rust prevention may leave residue on the item itself, requiring secondary cleaning.

3. China concentrated VCI oil

China concentrated VCI oil is a chemical used to protect metal surfaces from corrosion and oxidation. It works by releasing volatile molecules that form a protective layer on the metal, inhibiting corrosion. China concentrated VCI oil is widely used in many industries, including automotive, manufacturing, and packaging. China concentrated VCI oil is a simple and cost-effective way to prevent rust on metal products. China concentrated VCI oil is also very simple to use: simply apply a layer of oil to the metal surface. The VCI molecules contained in this oil form a protective film within the enclosed space, preventing the metal from rusting. China concentrated VCI oil evaporates upon exposure to the outside air, eliminating the need for residual residue or secondary cleaning, making it extremely worry-free and convenient to use.

This China concentrated VCI oil acts as a barrier between the metal and the environment, preventing moisture and oxygen from reaching the metal surface. China concentrated VCI oil is commonly used for small metal products such as tools and machinery.

4. Keep the Surface Clean

Keeping the surface of metal products clean also helps prevent rust. Dirt and debris trap moisture on the metal surface, creating ideal conditions for rust. As a professional rust preventative product supplier, CVCI recommends regular cleaning of metal products and keeping the metal surface dry.

5. Composite absorbent paper

Composite absorbent papers are essential for the storage and transportation of metal products in ocean containers, especially those susceptible to environmental conditions such as humidity, temperature, and air.

The high-molecular-weight, water-absorbing material (such as silica gel or polymer) within the Composite absorbent paper quickly captures condensation generated by daytime temperature fluctuations within the container, continuously controlling humidity below the critical corrosion level for metal (typically below 60%). Simultaneously, the VCI molecules impregnated within the Composite absorbent paper evaporate within the enclosed space and adsorb onto the metal surface, forming a monomolecular protective film that effectively blocks moisture and oxygen attack, providing comprehensive protection even for complex metal structures or inside packaging. This synergistic effect of "moisture absorption and rust prevention" provides stable protection throughout the entire ocean shipping process.

Composite absorbent paper

Composite absorbent paper

Composite absorbent paper acts like a super sponge, silently absorbing unwanted condensation droplets in the container, leaving the air dry and comfortable.

Composite absorbent paper's strong moisture absorption capacity helps metal products avoid the effects of moisture and air, helping to keep them in optimal condition.

Composite absorbent papers are available in a variety of sizes and types and can be custom-cut to fit your specific product.

6. Regular Inspection

Regular inspection of metal products can help detect rust early and prevent further damage. Inspect metal products for signs of rust, including discoloration, flaking, and chipping. If any signs of rust are observed, take immediate action to prevent further damage.

7. China antistatic VCI film Packaging

China antistatic VCI film packaging is a very common and popular anti-rust packaging solution that effectively protects metal and metal parts from rust and corrosion. It's a simple and effective packaging option that's easy to use and keeps metal items dry and clean.

Using China antistatic VCI film, you can safely prevent corrosion on the metal being protected without the need for grease, anti-rust powder, or any other time-consuming and labor-intensive protective methods.

How to inspect rust prevention results? Here are some quick inspection tips.

You've used a method, but how do you know if it's truly effective? Here are some quick inspections before shipment and after arrival:

• Visual Inspection: Focus on easily overlooked areas like metal edges and welds to check for red or white powder (signs of initial rust).

• Humidity Indicator Card: Place a small humidity indicator card inside the container. By observing the color change, you can visually determine whether the humidity level inside the container exceeds the specified limit.

• Sample Test: Place a small metal coupon (test coupon) of the same material inside the container. Upon arrival, inspect the coupon and infer the condition of the entire shipment.

Rust prevention isn't a rocket science; it requires careful preparation. By understanding the root causes of rust, you can choose the right rust prevention method for each metal product and avoid common misconceptions. Effective rust prevention is a systematic process. From pre-shipment treatment, to selecting rust-proof packaging materials, to controlling the transportation environment, every step is crucial.

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Email: cvci-gaoxiu@chinavci.com