18 Oct ASTM A/AM Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems. I currently need to passivate a partly electropolished L stainless steel The passivation procedure I intend following, in general, ASTM ASTM A [link is to . Specifying Pickling and Passivation. Pickling and Stainless steels will naturally self-passivate whenever a .. standards ASTM A and A outline iron.

Author: Zoloktilar Takus
Country: Jamaica
Language: English (Spanish)
Genre: Software
Published (Last): 17 May 2010
Pages: 343
PDF File Size: 18.43 Mb
ePub File Size: 7.46 Mb
ISBN: 379-4-32471-929-1
Downloads: 80013
Price: Free* [*Free Regsitration Required]
Uploader: Zulushura

This process greatly reduces the formation rust on the surface of the workpiece.

For certain exceptional applications, additional requirements which are not covered by this practice may be specified upon agreement between the supplier and the purchaser.

The values stated in each system may not be exact astm a380 passivation therefore, each system shall be used independently of the other.

Citric acid passivation as an alternative to nitric acid treatments Citric acid treatments can also be considered as an alternative to nitric acid as both provide the oxidising conditions necessary for passivation. In order to avoid ambiguity in the setting of requirements, it may be necessary for the purchaser to define precisely the intended astm a380 passivation of passivation.

Astm a380 passivation am not sure exactly what you want to do, but the citric formulations can give you increased performance over the old nitric formulations. Stainless steels cannot be passivated unless the steel surface is clean and free from contamination and scale from welding operations.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Visual inspection; wipe tests; residual astm a380 passivation water-break test; free iron test such as water-wetting or drying; high-humidity test; and copper sulfate test.

Precaution shall always be practiced to minimize iron contamination, in reuse of cleaning and pickling solution, in water rinsing, in circulation of cleaning solutions and rinse water, in protection of cleaned surfaces, for safety, and disposal of used solutions and water. I think you may be thinking of ammonium hydrogen difluoride which is often used in place of hydrofluoric acid in pickle solutions.


At Classic Electropolishing quality finishing and polishing is paramount, both to us and astm a380 passivation our customers. astm a380 passivation

ASTM A380 Passivation Standard

We do not have any trade shows on our calendar presently, we will update our calendar soon. In astm a380 passivation cases, no more than degreasing or removal of gross contamination is necessary. Astm a380 passivation A deals with the standards for cleaning, descaling, and passivation of stainless steel parts, equipment, and systems. Meaningful tests to establish the degree of cleanness of a surface are few, and those are often difficult to administer and to evaluate objectively.

It is also quite out of date and needs to be updated. Through this ASTM standard steps are taken to remove any dirt or cleaning solution that may be left on the part from prior machining.

Passivation is a post-fabrication method of maximizing the inherent corrosion resistance of stainless steel. Others, such as food-handling, astm a380 passivation, aerospace, and certain nuclear applications, may require extremely high levels of cleanness, including removal of all detectable residual chemical films and contaminants that are invisible to ordinary inspection methods.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up astm a380 passivation date. Quote Your Next Project. Degreasing and general cleaning shall be accomplished by immersion in, swabbing with, or spraying with alkaline, emulsion, chelate, acid, solvent, or detergent cleaners or a combination of these; by vapor degreasing; by ultrasonics using various cleaners; by steam, with or without a cleaner; or by high-pressure water-jetting.

In the case of classes C3 and C4, a two step process is defined, with a clean water rinse between the two steps, shown in the table below. Passivation is a process that removes exogenous iron or iron compounds from the surface of the astm a380 passivation steel alloy. Classic Electropolishing provides services for complex industry supply chains.


Could someone confirm or deny this effect? The degree of cleanness required on a surface depends on the application. Our facility is capable of handling a wide variety of projects, whether you need ATM A standards or a different type of finishing. Parts treated however must pass specific tests to confirm the effectiveness of the passivation, although in practice the tests are for the detection of the effects of residual iron contamination on the surface of the astm a380 passivation.

Some of the various meanings associated with the term passivation that are in common usage include the following: Depending on the application, chemical descaling acid pickling as described astm a380 passivation 5. Lee Kremer Stellar Solutions, Inc. Usually it is best to send the spools to a metal finishing shop which is already experienced in and equipped for the process. Citric acid treatments can also be considered as an astm a380 passivation to nitric acid as both provide the oxidising conditions necessary for passivation.

ASTM A Passivation Standard | Able Electropolishing

Unlike ASTM A, the standard does not require specific solutions for particular stainless steel grades or types, although astm a380 passivation specific treatments are identified. I currently need to passivate a partly electropolished L stainless steel process system. To my knowledge it is not possible to do a combination pickling and passivation.

While the practice provides recommendations and information concerning astm a380 passivation use of acids and other cleaning and descaling agents, it cannot encompass detailed cleaning procedures for specific types of equipment or installations. Such chemical treatment is generally not necessary for the formation of the passive metal oxide film.

In addition, this standard also includes citric acid treatments. The treatments are then defined by the process classes. This ensures that the surface of the workpiece is free of scale astm a380 passivation contaminates.

Materials shall be precleaned.