You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    STP538

    New Molten Salt Systems for Cleaning Stainless Steels

    Published: 01 January 1973


      Format Pages Price  
    PDF (344K) 12 $25   ADD TO CART
    Complete Source PDF (4.3M) 238 $74   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    Abstract

    Operating conditions determine the application of acid pickling, mechanical abrasion, and salt bath conditioning for cleaning stainless steel strip. Ecology requirements favor the use of molten salt baths as conditioning agents. Reductions in the concentration of pickling acids required can be accomplished by the chemical reactions of molten salts with the oxidized surface. The combination of electrical energy and highly active chemical salt baths is an effective method of continuously descaling stainless steel strip. A new low temperature and electrolytic process which operates at 400°F (204°C) is also quite effective. The construction of salt bath equipment from carbon steel and the inclusion of sludge collection and removal systems is recommended. A system of minimizing salt drag-out on a moving strip involves the use of high pressure steam as a scrubbing media. Synchronized roll drives are a new development in continuous strip processing through a molten salt bath. Molten salt spray systems are another new addition to the processing of continuous strip. High speed lines in the future may utilize all of these developments and clean pickling without the use of strong acids remains a distinct possibility.

    Keywords:

    stainless steels, cleaning, scale removal, descaling, chemical cleaning, salt baths


    Author Information:

    Shoemaker, R. H.
    President, Kolene Corp., Detroit, Mich.


    Committee/Subcommittee: D12.16

    DOI: 10.1520/STP41378S