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Stainless Steel Anodizing and Electropolishing

From METALAST International, Inc.
 

 
This technical bulletin briefly discusses stainless steel anodizing and electropolishing. Anodizing is designed to enhance the localized corrosion resistance of stainless steels, while brightness and smoothness are the primary results of electropolishing stainless steels with the side benefit of improving general corrosion resistance. The advantages, disadvantages, and potential applications of the processes are addressed as well. Stainless steels have widespread applications in a variety of areas, from household goods and architectural materials to industrial equipment, as a result of their excellent corrosion resistance to atmospheric environments. However, it has long been recognized that stainless steels are very susceptible to localized corrosion, such as pitting corrosion, crevice corrosion, stress corrosion cracking, etc., in anion-assisted aggressive environments. It is for this reason that a number of surface treatment technologies have been developed to further improve the localized corrosion resistance as well as the appearance of stainless steels for decorative purposes.
Product Announcements
Harrison Electropolishing, L.P. - Chemical Passivation Treatments
While not offering all of the benefits of electropolishing, chemical passivation will improve the corrosion resistance of stainless steel. The presence of exogenous surface contaminates may disrupt... (read more)
Polymer Technologies Inc. - MIM with 300-Series Stainless Steels
With its Ph.D. level engineers and metallurgical experts, PTI successfully manufactures parts from a variety of materials including 300-Series stainless steels. 300-Series stainless steels are... (read more)
Allegheny Surface Technology - Pickling/Chemical Cleaning
Allegheny Surface Technology offers In-House and On-Site Pickling/Passivation services. They can pickle passivate inside or outside a tank, depending on the size of your product. Pickling is the... (read more)
Allegheny Surface Technology - Electropolishing
Electropolishing is used in the pharmaceutical, electronic, food, beverage, automotive, aerospace and many other industries. Allegheny Surface Technology has been electropolishing for more than a... (read more)
Tempco Electric Heater Corporation - Circulation Heaters
Circulation Heaters consist of Screw Plug or Flanged Immersion Heaters, depending on kilowatt rating and size, mated to a pressure vessel. All welded joints on the vessel and heater are hydrostatic... (read more)
Central Electropolishing Co., Inc. - Improvement of Fatique in Stainless Springs
Improving the Fatigue life of springs via Electropolishing. Central Electropolishing has state of the art, automated tooling available to do any quantity of spring in a timely manner. We polish all... (read more)
Topics of Interest
Seawater or chloride salt solutions require a high level of corrosion resistance in metalhc materials. Conventional metals are susceptible to local corrosion such as pitting, crevice corrosion and... (Read More)
Chloride salt solutions, such as seawater, present a challenging environment for selecting materials with acceptable corrosion resistance. When exposed to these solutions, most metals are susceptible... (Read More)
4.6 PITTING CORROSION 4.6.1 DEFINITION It is a form of localized corrosion of a metal surface where small areas corrode preferentially leading to the formation of cavities or pits, and the bulk... (Read More)
Overview While high strength steels normally account for only about 5 15% of the airframe structural weight, they are often used for highly critical parts such as landing gear components, control... (Read More)
Nickel and nickel alloys are non-ferrous metals with high strength and toughness, excellent corrosion resistance, and superior elevated temperature properties. Nickel can also be magnetized. Nickel's... (Read More)