Epoxy-coated aluminum is aluminum covered with a thin, even layer of epoxy resin. The resin bonds firmly to the surface, forming a tough, protective shell. This shell works as a barrier against moisture, chemicals, and wear. It also gives the surface a smooth finish, which can be clear or colored.

Geomet coating is a water-based protective layer made from zinc and aluminum flakes. It forms a thin, even film on the surface of metal parts. This layer blocks moisture, salt, and chemicals, helping to stop rust and wear. Since it does not contain heavy metals like chromium, it is safer for workers and better for the environment.

Brushed aluminum has been mechanically polished to create a dull, consistent grain. This grain runs in a single direction, making the surface matte. The brushing removes small imperfections and gives the metal a sleek, modern look.

Black phosphate coating is a chemical conversion process. It applies a thin, dark gray or black layer of crystalline phosphate to steel. This happens when the parts are dipped into a hot mixture of phosphoric acid and other added chemicals. The coating sticks to the metal and creates a protective surface that feels slightly rough.

Blackening stainless steel means changing its surface to a dark color. This can be done using chemical, electrochemical, or heat-based methods. These methods create a thin, solid black layer on the metal. Unlike paint, this layer doesn’t peel or chip. Depending on the technique used, the finish can look shiny or matte.

Anodized blue refers to aluminum or another metal that has been anodized and then dyed blue. Anodizing is an electrochemical process. It thickens the natural oxide layer on the metal surface. This layer is hard, wear-resistant, and porous.

Galvanized steel has a pure zinc coating, offering strong rust protection and a shiny look. Galvannealed steel, on the other hand, is heat-treated after zinc coating, making it matte, harder, and easier to paint. Galvanized works well in wet places or where looks matter. Galvannealed is best when you need a surface that holds paint or can handle scratches.

Powder coating thickness is the depth of the coating applied to a surface. It is measured from the top of the coating to the part’s surface underneath. The ideal powder coating thickness ranges from 2 to 5 mils (50-125 microns). This ensures strong protection, a smooth look, and no performance issues.

Alodine and Anodize are two popular treatments for aluminum surfaces. Both improve corrosion resistance but use different methods. Anodizing is an electrochemical process that builds a thick, rigid, and non-conductive oxide layer on the metal. Alodine is a chemical process that forms a thinner, conductive layer. It offers good protection but keeps the metal’s electrical conductivity.

Linishing is a surface finishing method used to smooth and polish metal parts. It removes burrs, scratches, or weld marks using abrasive tools like belts or discs, making the surface cleaner and more even. It’s often done after cutting, welding, or shaping to prepare the part for painting, coating, or assembly.

DLC coating is short for Diamond-Like Carbon coating. It is a skinny layer of carbon-based material that shares some traits with natural diamonds. It’s a coating made from carbon atoms. These atoms are arranged in a way that mimics a diamond. This coating is applied to a part’s surface to make it harder, smoother, and more resistant to wear.

Salt spray testing, also known as salt fog testing, is a method used for corrosion testing. It exposes metal parts to a fine mist of saltwater solution inside a controlled chamber. The goal is to create an accelerated corrosive environment. This test helps evaluate how coatings, platings, and surface treatments withstand harsh conditions.

Titanium Nitride (TiN) is a ceramic coating. It has a metallic gold color and is applied to metal surfaces using a vacuum. The coating is skinny—just a few microns—but tough.

TiN forms a strong outer layer that resists wear, heat, and corrosion. It sticks well to metals like steel, titanium, and carbide. This makes it useful for cutting tools, molds, and medical devices.

Anodizing aluminum is an electrochemical process that increases the natural oxide layer on the surface of aluminum. The aluminum is immersed in an acid electrolyte solution during anodizing, and an electric current is passed through it. This causes the aluminum to react with the solution, forming an oxide layer much thicker than the natural oxide.

Surface grinding is a machining process that creates smooth, flat surfaces on metal parts. It uses a rotating grinding wheel to remove material in small amounts. This method gives parts better dimensional accuracy and surface finish.

It is often used in toolmaking, diework, and precision manufacturing. Surface grinders vary in size and capability, so selecting the right one depends on part size, material type, and finish needs.

Chrome plating is a finishing process that applies a thin layer of chromium onto a metal surface using electroplating. The process creates a bright, reflective finish while adding hardness, durability, and corrosion resistance to the base material.