Waste water treatment after removal of thermic oxides from stainless steel welding joints

Alar, Vesna and Runje, Biserka and Alar, Željko (2010) Waste water treatment after removal of thermic oxides from stainless steel welding joints. = Waste water treatment after removal of thermic oxides from stainless steel welding joints. Scholarly Research Exchange Engineering, 3. . Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. . Točan broj autora: 3.

Text Waste Water Treatment after Removal of Thermic Oxides from Stainless Steel Welding Joints.pdf - Published Version Restricted to IP adress Jezik dokumenta:English Download (1MB)

Abstract

This work describes chemical methods of removal of thermic oxides from stainless steel welding joints, as well as waste water treatment. Thermal oxides were removed from the stainless steel surface using chemical and electrochemical procedures. A pickling paste that contains HNO3 and HF in different ratios was used for chemical cleansing of thermal oxides (A, B, and C). Electrochemical removal was done using an apparatus Magic Cleaner, and as electrolyte a solution H2SO4+H3PO4 was used. Concentrations of chromium, nickel, and iron in the waste water have been determined using Method of Atomic Absorption Spectrophotometrics (AAS). Measured concentrations of Cr, Ni, and Fe are higher than allowed according to legal regulations of the Republic of Croatia. Therefore, an ionic exchange treatment of the waste water is recommended.

Item Type:	Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian):	removal of thermic oxides; stainless steel; chemical and electrochemical procedures
Subjects:	TECHNICAL SCIENCE > Mechanical Engineering
Divisions:	1000 Department of Materials > 1010 Chair of Materials and Tribology 1100 Department of Welded Structures > 1120 Chair of Materials Protection 800 Department of Quality > 810 Chair of Precise Measurement and Quality
Indexed in Web of Science:	No
Indexed in Current Contents:	No
Date Deposited:	30 Jun 2015 07:20
Last Modified:	17 May 2018 09:14
URI:	http://repozitorij.fsb.hr/id/eprint/4386

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