High Temperature Corrosion Coating

High Temperature Corrosion Coating

For corrosion resistant coatings, the Metatech Thermal Spray Pvt. Ltd. utilizes both barrier and sacrificial types of engineered coatings. These coatings adhere to the metal substrate and provide added protection against salt, chemicals, and high-temperature corrosive environments.

Coating

Benefits Of Corrosion Resistant Coatings

FUEL ECONOMY

Increases fuel economy when applied to certain automotive parts

LUBRICATES

Lubricates parts which reduce load caused by friction

FUNCTIONALITY

Improves functionality with a longer part life cycle

RESISTANCE

Resists harsh chemicals and extreme temperatures

COST SAVINGS

Lowers cost of servicing requirements as parts last longer

Corrosion Resistant Barrier Coatings

Barrier coatings provide a consistent film that prevents external elements from penetrating to the substrate. In other words, a barrier coating utilizes a thin layer of plastic resin which acts as a shield that blocks external factors from causing harm to the part. Every barrier coating contains a plastic resin protection layer which then combines with a filler layer to solve a specific problem. Wall paint, for instance, uses a coloring additive mixed with plastic resin and would be considered a barrier coating as it provides protection for the drywall while providing cosmetic appeal.

Corrosion Resistant Sacrificial Coatings

Sacrificial coatings contain certain elements, such as aluminum or zinc, which oxidize sacrificially to ensure that the substrate remains corrosion free. The salt spray resistant coatings, some which meet up to 1000+ hours of resistance, can also prevent galvanic corrosion when dissimilar metals are in contact with each other. Sacrificial coatings essentially fool the rust into eating away at the coating instead of the metal layers beneath. This happens because aluminum, or in some cases zinc, is added to the epoxy resin during the coating’s manufacturing process.

Coating Products For Corrosion Protection

For over 50 years, Metatech Thermal Spray Pvt. Ltd. has worked hard to supply our customers with the most reliable protective coating application options. We strive to deliver solutions for each of our customer’s unique needs, regardless of the difficulty of the challenge presented.

The Metatech Thermal Spray Pvt. Ltd. is fully equipped and ready to solve your problem with an effective, low-cost solution.

Acheson

The Emralon 310, Molydag 250 and Molydag 254 lubricants all provide corrosion resistance for a variety of components.

Doerken

All Doerken coatings are designed to combat corrosion.

Dow Corning

The majority of the Molykote line provides outstanding corrosion protection.

Lord Corporation

Chemlok 6254 is a Metatech Thermal Spray Pvt. Ltd. preferred coating that is used for the rubber-to-metal bonding process and is corrosion resistant, as well. We also use Chemlok 6260 for similar projects.

The Magni Group

Metatech Thermal Spray Pvt. Ltd. is a Magni-approved applicator. All of the Magni coatings have been designed specifically to protect components from corrosion.

Whitford

Metatech Thermal Spray Pvt. Ltd. is a Whitford-approved applicator. Many Xylan coatings are designed with corrosion protection as a top priority.

Types Of Corrosion

THE METATECH THERMAL SPRAY PVT. LTD. CORROSION RESISTANT COATINGS OFFER EFFECTIVE PROTECTION AGAINST THE MANY DIFFERENT FORMS OF CORROSION.

Though modern metals, with lowered carbon contents, are generally immune to intergranular corrosion, it is still a risk for any material containing carbon. The instigating factor in intergranular corrosion is high temperatures above 1,000°F (550°C). Heat treating metals is an excellent way to prevent this type of corrosion; the Metatech Thermal Spray Pvt. Ltd. offers a range of thermal barrier coatings to protect non-heat treated materials.

This term is used to describe any of a range of corrosive causes that may be present in an indoor or outdoor atmosphere. Multiple factors may work together to cause atmospheric corrosion. ISO 9223 standards rank environmental corrosiveness from C1 (least aggressive) to CX (most aggressive). This classification can help determine what materials may or may not be suitable for the application and environment, but atmospheric corrosion can occur even if material precautions are taken. Surface conditions can increase atmospheric corrosion-coarse surfaces tend to collect dirt and other particulates that can ultimately lead to corrosion, whereas smooth surfaces are less susceptible.

Generally referred to as rusting, oxidation occurs when Iron is exposed to oxygen in the environment, and therefore is perhaps the most common form of corrosion. Temperature variations can accelerate the oxidation process. Rust scales made of iron oxide develop on the surface, which can somewhat paradoxically provide protection against further oxidation. However, rust can also penetrate deep into metal materials. There are a number of methods of preventing oxidation, from simply painting the surface to Metatech Thermal Spray Pvt. Ltd.'s specialized corrosion resistant coatings.

Formed in tight spaces where oxygen content is limited, crevice corrosion generally affects flanges, threaded connections, and other mechanical joints in equipment and machinery. Dissolved metal ions and chloride ions infiltrate these low-oxygen crevices, creating large, shallow areas of corrosion.

Generally highly localized, pitting corrosion causes discrete pits on unprotected metal surfaces. Each pit effects a very small surface area, but the corrosion rate is high and often fast-acting. There are a number of potential causes of pitting corrosion, including seawater exposure, high-chloride process solutions, oxidative chemicals, and more. All of these factors can be exacerbated by increased temperatures and low-pH environments.

In any potentially corrosive environment where two dissimilar metals come into repeated mechanical contact, galvanic corrosion is likely to take place. Materials such as carbon and galvanized steel, copper, and brass are all highly susceptible to this destructive process. In galvanic corrosion, the metal with lower positive electrode potential is generally more affected, and corrosion rates can be very high and fast-acting. Both barrier and sacrificial coatings from the Metatech Thermal Spray Pvt. Ltd. provide effective solutions for galvanic corrosion.

As the name suggests, uniform corrosion is consistent degradation across a large part of an unprotected metal surface, often the entire surface. Uniform corrosion generally occurs in work environments with constant temperature and chemical exposure, and generally takes place at a constant, if gradual, rate. It is usually easier to protect against than localized corrosion processes.

High-temperature atmospheres rich in oxygen, sulfur, or halogens can cause severe corrosive reactions. These "reducing" environments can affect aluminum, silicon, chromium, and other metals and alloys. Special high-temperature coatings from Metatech Thermal Spray Pvt. Ltd. can protect most metallic substrates against corrosive reactions at elevated temperatures.

Though not technically corrosion, cracking and fatigue are still very harmful to metal and alloy materials. Generally caused by a combination of mechanical stress and corrosive environmental factors, cracking can spread very quickly and cause more rapid failure than corrosion alone. Corrosion fatigue is usually caused by a combination of cyclic load and corrosive factors, and can quickly lower the material's fatigue strength. A corrosion resistant coating from Metatech Thermal Spray Pvt. Ltd. will help combat the corrosive factors that lead to undue cracking and fatigue.