Will steam blasted aluminum rust? Fully explained

As we all know, aluminum is widely used in various industries due to its lightweight, durable and corrosion-resistant properties.

When it comes to surface finishing and treatment, vapor blasted aluminum has become a popular choice, especially in industries where evaporators are one of the hottest trends.

The accompanying question is: Will steam blasted aluminum rust?

This article looks at the details of steam blasting, aluminum corrosion, and whether steam blasted aluminum is susceptible to rust.

What is steam blasting?

Steam blasting, also called wet blasting or liquid honing, is a surface finishing process that combines water, abrasive particles and compressed air to clean and polish surfaces.

The abrasive is usually glass beads, but can also be aluminum oxide to more aggressively remove rust and coatings.

In contrast to dry blasting, steam blasting is a gentler process that creates a finer finish without damaging the surface.

The water acts as a lubricant, reducing the effectiveness of the abrasive and minimizing surface erosion.

Will steam blasted aluminum rust?

Aluminum goes through a process called oxidation, which forms a protective layer of aluminum oxide on its surface.

This protective layer prevents further oxidation and corrosion, making aluminum ideal for environments where moisture and oxygen are present.

Therefore, aluminum does not rust, and when used correctly, steam blasting will not damage this protective oxide layer. So the answer is: steam blasting aluminum doesn't rust!

Influence of steam blasting on corrosion resistance

Steam blasting can improve the corrosion resistance of aluminum by cleaning the surface and removing contaminants.

However, it is important to note that improper steam blasting techniques or incorrect blasting media can potentially damage the oxide layer and lead to increased susceptibility to corrosion.

Factors influencing corrosion resistance

Several factors can affect the corrosion resistance of steam blasted aluminum rust:

Abrasive material

The choice of abrasive is crucial. In general, non-metallic abrasives are preferred to avoid the incorporation of metal particles that can promote galvanic corrosion.

Water quality

When steam blasting, clean, deionized water should be used to prevent the ingress of contaminants that could affect corrosion resistance.

Blasting parameters

The pressure, abrasive concentration and nozzle spacing must be carefully controlled to avoid damaging the surface.

Protective measures

While steam blasting increases corrosion resistance, it is important to take additional protective measures, especially in harsh environments:

Clear coating

Applying a clear protective coating can provide an additional barrier against environmental influences.

Anodising

Anodizing can further strengthen the oxide layer, providing better corrosion protection.

Regular maintenance

Regular cleaning and maintenance can help maintain the integrity of the steam blasted surface.

Advantages of steam blasting

Steam blasting is often used in industry.

It is often used on machined parts to clean or create an even finish without removing material.

It is also used to clean used parts in preparation for reconstruction.

It works equally well on aluminum and ferrous metals.

Steam blasting additives can prevent rust or other corrosion.

Vapor blasting is sometimes used on aluminum to achieve an even finish before anodizing, and on ferrous metals before applying coatings such as paint, Teflon, etc.

Occupational safety

Dust Reduction: Steam blasting reduces hazardous dust by 95% compared to traditional sandblasting.

The water in the steam blasting process coats the abrasive particles and causes them to fall to the floor instead of becoming airborne.

This makes steam blasting a safer option, especially in multi-worker environments, and is recommended by OSHA.

Heat reduction

Avoiding Surface Damage: Dry blasting produces significant heat due to friction, which can cause problems such as warping thin metals or cracking weak substrates.

In contrast, during steam blasting, the water keeps the blasted surface cool, helping to prevent damage to sensitive materials and coatings.

Effective for hard coatings

Improved Performance: Steam blasting is great for removing extremely stubborn coatings.

The inclusion of water not only suppresses dust and dirt, but also increases the weight of the blasting media so that it hits the substrate with greater force compared to dry blasting.

Simultaneous cleaning and removal of coatings

Dual functionality: While dry blasting focuses primarily on removing coatings, steam blasting also serves as an effective cleaning solution.

It combines the cleaning and coating removal processes in one step, making it a more efficient choice.

Environmental concerns

Environmentally friendly: Steam blasting is a more environmentally friendly option than sandblasting.

It can be easily contained, reducing the risk of airborne particles damaging natural areas and plants.

This containment is particularly important in marinas and other sensitive environments where wet blasting is preferred to prevent dust from contaminating waterways.

Can steam blasting be used on other metals besides aluminum?

Steam blasting is primarily used to clean and polish aluminum surfaces to improve their appearance and corrosion resistance.

However, steam injection can be used on a variety of metals, including steel, brass and titanium.

However, the process parameters may need to be adjusted to the specific material being treated.

Care for steam blasted aluminum

To ensure steam blasted aluminum maintains its optimal appearance and performance, follow these care tips:

Regular cleaning

Consistent cleaning is crucial.

Use mild detergents and soft cloths to gently remove dirt and grime to avoid surface damage.

Avoid harsh chemicals

Avoid harsh chemicals or abrasives that could damage the aluminum surface or attack the protective oxide layer.

Opt for gentle cleaning products for aluminum.

Protective coatings

Applying a clear protective coating can help maintain the steam blasted finish and provide additional protection from environmental elements.

This is particularly advantageous in maritime or industrial environments.

Inspection and maintenance

Check aluminum parts regularly for signs of wear or corrosion.

Correct any problems promptly to prevent further damage and extend component life.

Diploma

So will steam blasted aluminum rust? While aluminum itself does not rust, steam blasting is an effective technique for improving the appearance and performance of aluminum components.

This process cleans and polishes the surface, which can improve aluminum's natural corrosion resistance.

However, to achieve optimal results, it is crucial to use the correct techniques and employ appropriate protective measures.

Understanding the benefits and considerations of vapor blasting will help you make informed decisions regarding its use and the maintenance of your aluminum parts.