Corrosion-resistant alloys are materials, which have been engineered and created to have superior corrosion resistance and are used to manufacture end-products that will endure and survive the damaging effects of corrosion. These alloys, depending on their composition, may be categorized as high temperature alloys, stainless steels, nickel alloys, exotic alloys, titanium, and high performance alloys (aluminium) to name a few. Corrosion resistance is a combination of many factors, including alloy composition, protective treatments, and the test conditions used.
High temperature alloys. High temperature alloys are designed to resist scaling and oxidation at high temperatures. Designed for temperatures as high as 2,000°F (1,093°C), high temperature alloys are strong, ductile and resistant to corrosive atmospheres. These alloys are usually made from nickel, chromium, molybdenum, and iron.
Stainless steels. The most well-known corrosion-resistant alloy is stainless steel. This family of alloys offers superior corrosion resistance through a combination of chromium and other alloyed elements such as nickel, molybdenum and nitrogen. Stainless steels are divided into three distinct categiries based on their composition and structure.
Nickel alloys. Nickel alloys are a large and diverse group of corrosion-resistant alloys. These alloys are often used in high temperature, highly corrosive environments and in medical and chemical processes. Nickel alloys have very good corrosion resistance, strength and weldability, making them an excellent choice for a variety of applications. Nickel alloys can be divided into two categories based on their composition: cobalt and aluminum-based alloys.
Exotic alloys. Exotic alloys are specifically designed for their superior corrosion resistance. Commonly made from a combination of stainless steel and other exotic metal alloys, these alloys are particularly suited for applications involving severe corrosive environments. Exotic alloys can also be used to produce components with enhanced mechanical properties, such as increased strength and ductility.
Titanium. Titanium alloys are one of the most corrosion-resistant alloys available. Titanium is proven to have superior corrosion resistance, even outperforming stainless steel in many applications. It has excellent strength, corrosion resistance and weldability. Titanium alloys are primarily used in the chemical plant industry, aerospace industry and medical applications.
High performance alloys. High performance alloys are designed for superior corrosion resistance, strength and durability. They are used in extreme conditions, such as in high-temperature, highly corrosive environments or applications with high mechanical requirement. The most common types of high performance alloys are aluminium, copper, zirconium and nickel based alloys.
No matter the application, there are a variety of corrosion-resistant alloys available to suit the needs of the user. These alloys are designed to provide superior corrosion resistance, strength, durability and weldability, ensuring their longevity and performance in extreme conditions. With the right alloy, end-users can achieve their desired results, while protecting their investment from corrosive environments.
