Wear Resistant Coatings
Your design is finished. The build, too, is complete. Now, to ensure your product or equipment will last, hardening the surfaces is all you need. Right?
Our answers may surprise you.
See our articles. Talk to our sponsors. We're here to help you find the right answers, the most wear resistant coatings available today.
What makes a coating resist abrasion? How do you choose?
First, understand the types of wear and their contributing factors:
Wear Adhesion -- visible by fretting, pits, holes or scales transfer, the result of softer materials dislodging from a widened hardness gap between two moving surfaces. Besides a drop in performance, look for visible changes in surface finish, dimensional or geometric distortion.
Wear Abrasion -- witnessed by scratches, grooves, or corrugations, caused by loose abrasive particles torn away from the wear surface. Also look for negative changes in performance, surface finish, dimensional or geometric distortion.
Wear Surface Scarring-- seen by tears or small holes, typically relates to shock or impact, and involves fatigue close to the wearing surface.
Wear Surface Erosion-- manifested by dimensional loss, but first by changes in surface finish, a natural form of polishing. Here, the mated surface consists of fine particles in the form of solids, semi solids, or liquid suspensions traveling at high rates across a surface.
Wear ‘Tribo’ Oxidation-- involves oxidation products from the wearing surface, usually in particulate form. Often harder than their parent metals, surfaces become rough which, in turn, leads to abrasive or adhesive wear.
Is increased hardness from your coating the answer?
Hardness is a term relative to other materials. By definition, we say hardness is the ability to resist plastic deformation under contact stress or penetration. Other characteristics equally important can include flex strength, or resistance to mar, abrasion, or cutting.
Hardness can be characterized two ways:
Micro Hardness-- the individual hardness of each grain size or particle.
Macro Hardness-- an average hardness of individual grains or particles.
Choosing a coating for its macro hardness, alone, may not suffice. It depends on the amount of surface area contact and mechanics involved.
For Wear Surface Erosion, micro hardness is key. That's where surface contact can be localized, most severe.
But for Wear Abrasion, Wear Adhesion, Wear Surface Scarring or Wear Tribo-Oxidation (sliding wear) consider lubrication and surface finish, too.
Parent metal can play an integral part of wear resistant coatings. Do you need structural support? Are large contact stresses involved at the surface? To avoid coating failure, be sure, where possible, that your coating resists plastic deformation more than its parent material.
Industrial Coatings World.com is more than making coating choices. We're about helping you make better equipment, faster products, more reliable, with less scrap.
We share your goal to gain the edge in surface performance.
Here, in the following articles, and with our sponsors, you’ll discover new, state-of-the art advancements in wear resistant coatings. Plating. Anodizing. Nitriding. Vapor Deposition. Thermal Spray. Teflon. Dry Film Lubricants. Ceramics.
Why Industrial Coatings World.com?
Because, for product designers, engineers, and equipment manufacturers who use coatings, there is so much more to know.