Aluminum Hard Anodizing Services

Aluminum Hard Anodizing Services

The term "hard anodizing" is a process for producing anodic coatings for engineering applications. Their main feature is high wear resistance or hardness and high thickness. Types of anodic coatings and their properties are provided in MIL-A-8625F standard. In this standard, which is considered a valid reference by all anodizing service centers around the world, hard anodic coatings on aluminum alloys are classified as type III coatings. The allowable thickness range is between 12.7 and 114 micrometers, while the normal range is 50 micrometers. The goals and services of Allodize Engineering Company are also based on international standards. However, it should be noted that greater thickness does not necessarily mean greater hardness. However, the thickness of the anodic coating is the result of a trade-off between its growth rate under Faraday's law and its dissolution rate. The hardness of these coatings depends firstly on the applied current density, secondly on the chemical composition and temperature of the electrolyte. Therefore, increasing the thickness of the coating is best done with solutions that have a low dissolution rate of Al2O3, ie at low temperatures (below 5 ° C) and high current densities (about 2-3 dS). \ Density The current applied in the hard anodizing process is several times higher than in the normal anodizing process. Hard anodizing is usually done to control current rather than voltage, because when producing a thick anodic coating, the voltage increases from the initial value of about 20 volts to more than 100 volts, depending on the chemical composition of the alloy, the electrolyte and its temperature. . The applications of hard anodized aluminum are growing today. Depending on the characteristics of the coating, they are applied in different contexts. Because they are resistant to erosion, impact, abrasion and scratches, products such as valve bodies, piston crowns, pumps and impellers, guide rails, pneumatic cylinders, low load bearings, rails, kitchen utensils, industries Textiles, automobiles and… are made of hard anodized aluminum alloys. We are proud to be able to provide services to reputable manufacturers with high quality and competitive price. Alireza Keyvanpour - Researcher and Founder of Allodize Surface Coating $ 0101 , Hardening, Hardening, Hardware containers, hardanodizing, hardanodize