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Coating Formation Rate

From METALAST International, Inc.
 

 
A high coating formation efficiency (or coating formation rate) is one of the benefits provided by the METALAST anodizing process. Effective coating formation can benefit the anodizer in the form of greater operating efficiency and superior oxide performance. Various aluminum alloys were anodized using the METALAST Process Control System (MPCS) according to the chosen recipes with a target thickness of anodic coatings. The resultant coating thickness was measured using an Isoscope (Fischer Scientific, MP2C). The coating formation rates were calculated by dividing the target thickness of the anodic coating with the respective process time. Both the anodizing and the measurements were performed at the METALAST Tech Center. The figure below shows the relationship between the coating thickness and anodizing time during the METALAST Type III (MLT-III) anodizing process for 7075 aluminum. In contrast to the traditional anodizing process where the coating formation rate decreases with anodizing time, the METALAST technology provides a constant coating formation rate throughout the process.
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Industrial coatings are thin films deposited upon materials to add or enhance desired properties, such as color, conductivity, corrosion resistance, etc. Search by Specification | Learn more about Industrial Coatings
Product Announcements
DiFruscia Industries, Inc. - Anodizing
Anodizing entails the immersion of an aluminum part in an electrolyte where an electric current is passed through the part. The surface is converted to aluminum oxide - one of the hardest substances... (read more)
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Hardcoatings, Inc. - Hardcoat Anodizing
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Topics of Interest
The METALAST process includes the METALAST anodizing solution chemistry and Process Control System (MPCS). The anodizing recipes tailored for various alloys and different anodizing applications can be... (Read More)
Typical wrought aluminum alloys were anodized in the METALAST solution under Type II and Type III conditions at pulsed current and no-pulsed current respectively to determine the effect of the pulsed... (Read More)
The aluminum buildup rate is an important aspect in assessing the efficiency of an anodizing process. It will determine the decant rate, and in turn will affect the anodizing costs which are related... (Read More)
The performance of a process is often evaluated using the process capability index, (Cpk,) which measures the ability of a process to create products within specification limits. The Cpk value is a... (Read More)
The coating formation efficiency of the METALAST anodizing processes for a variety of aluminum alloys is summarized in both tabular and graphic forms in this report. It is obvious that the METALAST... (Read More)
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