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Sol-gel is a transformative process that converts small molecules into inorganic polymers, forming robust coatings for a variety of substrates. This technique is known for its precise surface treatment, which is crucial for giving aerospace parts better wear resistance and heat stability.


Key Steps In The Sol-Gel Process

Understanding the key steps of the sol-gel process is crucial for companies aiming to utilize this technology for high-quality surface finishing. The process can be broadly divided into four main stages: preparation of the sol, gelation, aging, and drying and heat treatment.


Preparation Of The Sol

This initial stage involves mixing the chemical precursors, typically metal alkoxides or metal chlorides, in a solvent. The addition of water initiates hydrolysis reactions. The composition of the sol, including factors like concentration, pH, and temperature, determines the properties of the final gel.



As the sol undergoes further reactions, it gradually increases in viscosity until it forms a gel. This transition marks the formation of a continuous network of either metal oxide or polymer chains. The time taken to reach this point, known as the gelation time, is influenced by the specific conditions of the sol preparation.



After gelation, the gel structure strengthens during the aging process. This step involves holding the gel at a constant temperature, allowing for further polycondensation and strengthening of the network. Aging can significantly influence the pore structure and mechanical properties of the final material.


Drying And Heat Treatment

The final stages are drying and heat treatment. Drying removes the remaining liquid from the gel, leading to shrinkage and densification. Heat treatment or calcination then follows, where the gel is heated to higher temperatures. This step burns off any organic residues and crystallizes the material, enhancing its mechanical strength and stability.

How Sol-Gel Improves Aircraft Safety And Durability

Safety is the top priority in aerospace, and sol-gel technology plays a key role in maintaining it, making sure every flight meets the highest safety standards.


Structural Integrity

Sol-gel fortified surfaces significantly enhance the structural integrity of aircraft, withstanding the stresses of daily operation. Valence focuses on safety by making coatings that help strengthen aerospace engineering.


Enhanced Wear Resistance

Heavy wear and tear is a constant threat in the relentless environment of flight. Sol-gel coatings provide a shield against this wear, granting aerospace components an extended lifespan and maintaining their functional integrity.


Improved Environmental Resistance

The harsh atmospheric conditions at high altitudes necessitate coatings capable of resisting environmental degradation. Sol-gel coatings developed by Valence ensure that aircraft are well-equipped to handle these challenges, safeguarding both the craft and its passengers.


Valence’s Advanced Sol-Gel Technology In Aerospace Engineering

Valence is committed to engineering excellence and innovation, especially in applying sol-gel technology in aerospace engineering.


Engine And Critical Component Coating

Aircraft engines must work perfectly in extreme conditions like intense heat and corrosion. Valence uses sol-gel technology to coat these parts, making them not just resistant to high temperatures and corrosion but also improving their performance and reliability.


Customized Solutions For Avionics

Avionics systems need to work flawlessly. Valence’s sol-gel coatings protect these systems from environmental and operational challenges, greatly increasing their reliability and performance.


Airframe Surface Treatments

Treating airframes with sol-gel coatings strengthens the core of the aircraft. These coatings protect the airframe from physical forces, temperature changes, and bad weather, ensuring safety and durability for every flight.


Specialized Coatings For Space And Defense

The demands of space and defense are far greater than that of commercial aviation. Valence creates sol-gel coatings to withstand the extreme conditions of space and the strict demands of defense applications. These coatings are not just protective layers but also specially designed to support and safeguard materials used in these challenging environments, enhancing the success of each mission.

Frequently Asked Questions


Are sol-gel coatings adaptable to different types of aerospace materials and substrates?

Yes, sol-gel coatings can be applied to various substrates and materials commonly used in aerospace engineering, offering versatility in protection.


How do sol-gel coatings contribute to fuel efficiency in aircraft?

Sol-gel coatings help reduce the overall weight of aerospace components, contributing to improved fuel efficiency without compromising durability.


Are sol-gel coatings resistant to extreme temperature fluctuations encountered during aerospace operations?

Yes, sol-gel coatings exhibit thermal stability, remaining effective in extreme temperature conditions commonly faced during flight.


Can sol-gel coatings be applied to complex geometries or intricate aerospace components?

Yes, sol-gel coatings can be tailored and applied to complex shapes and intricate aerospace components, ensuring comprehensive protection.


How do sol-gel coatings contribute to reducing the environmental impact of aerospace operations?

Sol-gel coatings increase the durability of aerospace components, reducing the need for frequent replacements, which in turn minimizes waste and environmental impact.


Are sol-gel coatings compatible with existing aerospace manufacturing processes?

Yes, sol-gel coatings can be integrated into existing manufacturing processes seamlessly without requiring significant alterations.


How do sol-gel coatings improve the safety standards of aerospace components?

Sol-gel coatings provide an additional layer of protection, enhancing safety by mitigating potential risks associated with component wear or degradation.


Can sol-gel coatings be removed and reapplied during maintenance without compromising effectiveness?

Yes, sol-gel coatings can be removed and reapplied during maintenance, ensuring continued protection and functionality of aerospace components.


How do sol-gel coatings contribute to reducing downtime for aerospace maintenance?

Sol-gel coatings, with their durability and reduced maintenance needs, help minimize downtime, allowing for more efficient aerospace operations.


Can sol-gel coatings be applied to both new and existing aerospace components?

Yes, sol-gel coatings can be applied to both new components during manufacturing and existing ones during maintenance or overhaul.

Painting Services


Primer, also known as undercoat, is the preparatory coating that can be used to enhance the bond strength of a topcoat and/or improve the corrosion resistance of a part. Applying primer is a crucial first step to the lasting results.

Fuel Tank Coating

Fuel tank coating is a specialty coating applied to the interior of aircraft fuel tanks that protects against corrosion from fuel contaminants. The coating allows fuel tanks to meet industry standards for longer durations.

Adhesive Bond Primer
Adhesive bond primer is primer used for particularly hard to bond to applications, often used in combination with anodize or plating processes. Bond primers can also be used to enhance the emissivity characteristics of a part.

Topcoat is the final coating on a part often used for cosmetic purposes. However, it often has application specific properties, such as reflectivity, conductivity, etc. The topcoat provides durability and resistance to harmful materials that will cause parts to deteriorate.


Anti-Chafe topcoats are specific coatings that are primarily used on surfaces where abrasion resistance, low friction and impact resistance are required to reduce chafing and wear. This specific topcoat serves as a defense in harmful environments.

Dry Film Lube

Dry film lube is a dry lubricant coating that reduces friction on surfaces sliding against each other. It offers operation at higher temperatures than other lubricants.


Sol-Gel is a process of creating metal oxides when applied to a part using metal alkoxides. The sol-gel is in high demand as it allows adhesive bonding of titanium and corrosion resistant alloys.

Zinc Spray

Zinc spray, or zinc chromate spray is a primer with corrosion inhibiting properties, commonly used on aluminum aircraft or spacecraft components. It is a high quality aerospace plating technique.

Digital Masking
Valence uses CATIA software to create precision digital masking templates that improve the consistency and the ability to control dimensional tolerances of masking points.

Valence performs all of these services to the highest degree of care, with approvals for most prime and military specifications. Our products and services significantly enhance safety, long-term use, and consistency in the aerospace industry.

Painting Capability Sizes

Valence Eastman L Valence Wichita L Valence Grove L Valence Los Angeles L Valence Seattle L Valence Everett L Valence Garden Grove L
Bond Primer 20' Bond Primer 16' Bond Primer 24' Bond Primer 27' Bond Primer 6' Bond Primer 30' Bond Primer 10'
Dry Lube 20' Dry Lube 16' Dry Lube 10' Dry Lube 27' Dry Lube 2.5' Dry Lube 30' Paint 10'
Fuel Tank Coating 20' Fuel Tank Coating 16' Fuel Tank Coating 24' Fuel Tank Coating 27' Fuel Tank Coating 6' Fuel Tank Coating 30'
Primer 20' Primer 16' Primer 24' Primer 27' Prime and Topcoat 6' Primer 30'
Topcoat 20' Sol Gel 16' Topcoat 24' Topcoat 27' Sol Gel 4' Topcoat 30'
Sol Gel 20' Topcoat 24' Sol Gel 24' Sol Gel 27' Sol Gel 30'
Zinc Spray 12'
Shot Peen + Blast
Chemical Processing
Painting + Spray Coatings
Other Services

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