Passivating
Tips & Advice to help you make your decision on Passivating
Some industries use metal components that experience a buildup iron which contaminates the equipment or the process. This typically occurs when stainless steel parts move against each other causing friction. It can occur during storage, transportation or use. Passivating is an inexpensive process which removes the iron build up and then coats the underlying metal to prevent it from future iron deposits.
This can happen in any industry where metal components are used. Some industries have specific standards as to how passivating can be done including whether nitric or citric acid is acceptable or only citric acid. Make sure you know whether or not you are required to meet certain specifications in your industry before having your parts and equipment treated.
Some components can be sent out to be treated. The parts needing treatment are packaged, shipped and then treated and returned. In some cases, however, equipment is not easily dismantled and shipped. In those cases, some companies will bring in a service that is capable of performing the treatment on site. While this might be more costly, it is a great advantage over having to replace the equipment or components if they are left untreated and severely damaged.
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Passivating
Increase product life with passivating servicesBy B. Lumadue Passivating removes iron contamination from the surface of metal. Chemicals are used to dissolve the iron components, then the passivating process produces a thick film that protects the metal from further corrosion.
Iron is deposited on stainless steel during storage, machining, or operation, when parts move against each other and produce friction. Passivation is an inexpensive process that can save money in the long run, since the contamination and corrosion of parts can reduce product life.
Equipment that can benefit from passivating services include plant and factory equipment, aerospace and medical devices, computer components and automotive and marine parts. Some things to look for in a passivation service include:
1. Passivation services that meet the requirements of your industry;
2. On-site passivating services for large or unmovable equipment;
3. Passivating equipment and chemicals that enable you to do the job in-house.
Use passivating techniques that meet industry standards
Regulated industries must follow specific requirements for passivation processes. Passivation techniques include nitric or citric acid passivation. Some industries specify that citric acid must be used.
Try: Astro Pak is a leader in passivation services. The company offers approved on-site and in-house services that meet various industry standards at locations throughout the United States. Imageering Finishing Technologies works with more than 1,000 industry specifications. Able Electropolishing offers patented Brite passivation, which combines manual and chemical passivating for a cleaner, brighter finish. The process is approved by several industries. Send in a part to get a sample cleaning. Harrison Electropolishing supports industry standards and specializes in services for the bio-pharmaceutical industry.
Find a mobile passivating service
Many passivating companies offer on-site services. They can come to your location to work on large equipment.
Try: Delstar Metal Finishing offers on-site passivating and chemical cleaning services. Allegheny Surface Technology provides several on-site services in addition to passivation and will clean a sample for free. Central Electropolishing provides on-site passivating for stainless steel and nickel alloys.
Find equipment and chemicals from passivation experts
If metal passivation is a service your company requires regularly, consider investing in equipment and parts that enable you to do it in-house.
Try: Stutz offers a large variety of passivating equipment and chemicals. Best Technology provides standard equipment for passivation of small or large parts and specializes in custom equipment for specialized needs.
- Most passivation experts will clean sample parts for free. They often require that a specific type of part be submitted for the sample. Check the requirements before sending in an item.
- Find out whether the passivating service provider offers testing and certification. The tests - such as humidity and salt water testing - should be similar to operating conditions.
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