The micro-crystalline anodizing process improves on both standard anodizing and hard anodizing by creating coatings that are more thermodynamically stable and provide even greater resistance to strong chemicals. This improvement stems from the arrangement of molecules in the coating in a regularly ordered, repeating pattern (other anodic coatings’ molecules are arranged randomly). The ordered micro-crystalline layer of these anodic coatings gives them superior resistance to the acids and alkalines found in common detergents, which can slowly break down other type of anodized coatings after repeated exposure.
Benefits of Micro-Crystalline Anodizing
The unique micro-crystalline structure of these coatings give them several advantages over other anodized coatings. In addition to greater stability and chemical resistance, micro-crystalline anodized coatings provide excellent steam resistance, improved dielectric properties in comparison to hard coat anodizing of comparable thickness, and a more consistent adherence to dimensional tolerances. Most micro-crystalline anodized coatings are also fully RoHS compliant.
Micro-crystalline anodic coatings’ corrosion resistance is notably better than other methods of coating and protecting aluminum materials. They offer greater chemical stability than hydro-thermal seals, greater reduction of porosity than precipitating seals, and superior tolerances than encapsulation coatings.
Dyeing & Printing
The micro-crystalline anodizing process is ideal for adding colors to treated aluminum parts and components. Nearly all colors, from the brightest and most vivid to pastels, grays, and earth tones, can be added to micro-crystalline coatings. Unlike conventionally dyed aluminum coatings, colored micro-crystalline anodized coatings are not susceptible to leaching during autoclave sterilization. The stability of the pore structure of these coatings eliminates contamination and color fading.
Micro-crystalline anodic coatings can also be specially printed with ink embedded within the aluminum oxide layer. Because this printing is not solely on the surface of the part, it will not delaminate or chip, and so provides greater durability and resilience for the printed information.