PRODUCTION PROCESS OF GALVANIZED STEEL SHEET

PRODUCTION PROCESS OF GALVANIZED STEEL SHEET

PROBLEM TO BE SOLVED: To establish galvanization conditions effecting high rust inhibitory performance of a galvanized coating layer by appropriately controlling the temperature, pH, current density and galvanized coating layer thickness in an electrolytic solution consisting of a zinc sulfate hydra...

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1. Verfasser: BOKU KENSHU
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APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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creator BOKU KENSHU
description PROBLEM TO BE SOLVED: To establish galvanization conditions effecting high rust inhibitory performance of a galvanized coating layer by appropriately controlling the temperature, pH, current density and galvanized coating layer thickness in an electrolytic solution consisting of a zinc sulfate hydrate and ammonium sulfate, in a production process of a galvanized steel sheet. SOLUTION: This production process comprises: a pretreatment stage for cleaning and picking the surface of a steel sheet; a main stage for performing galvanization of the pretreated steel sheet by passing it through a galvanization cell; and a post-treatment stage consisting of cleaning, oiling and drying operations for the resulting treated steel sheet; wherein the pretreated steel sheet is passed through a galvanization electrolytic solution consisting of 87-97 wt.% of ZnSO4.8H2O and 3-14 wt.% of (NH4)2SO4 under conditions of 100-300 mA/cm2 current density, 48-52 deg.C temperature of the electrolytic solution and a pH value of the electrolytic solution of 3.5-4, to form a galvanized coating layer having a 5-7 μm thickness.
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SOLUTION: This production process comprises: a pretreatment stage for cleaning and picking the surface of a steel sheet; a main stage for performing galvanization of the pretreated steel sheet by passing it through a galvanization cell; and a post-treatment stage consisting of cleaning, oiling and drying operations for the resulting treated steel sheet; wherein the pretreated steel sheet is passed through a galvanization electrolytic solution consisting of 87-97 wt.% of ZnSO4.8H2O and 3-14 wt.% of (NH4)2SO4 under conditions of 100-300 mA/cm2 current density, 48-52 deg.C temperature of the electrolytic solution and a pH value of the electrolytic solution of 3.5-4, to form a galvanized coating layer having a 5-7 μm thickness.</description><edition>7</edition><language>eng</language><subject>APPARATUS THEREFOR ; CHEMISTRY ; ELECTROFORMING ; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ; METALLURGY ; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS</subject><creationdate>2001</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20010515&amp;DB=EPODOC&amp;CC=JP&amp;NR=2001131790A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20010515&amp;DB=EPODOC&amp;CC=JP&amp;NR=2001131790A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>BOKU KENSHU</creatorcontrib><title>PRODUCTION PROCESS OF GALVANIZED STEEL SHEET</title><description>PROBLEM TO BE SOLVED: To establish galvanization conditions effecting high rust inhibitory performance of a galvanized coating layer by appropriately controlling the temperature, pH, current density and galvanized coating layer thickness in an electrolytic solution consisting of a zinc sulfate hydrate and ammonium sulfate, in a production process of a galvanized steel sheet. SOLUTION: This production process comprises: a pretreatment stage for cleaning and picking the surface of a steel sheet; a main stage for performing galvanization of the pretreated steel sheet by passing it through a galvanization cell; and a post-treatment stage consisting of cleaning, oiling and drying operations for the resulting treated steel sheet; wherein the pretreated steel sheet is passed through a galvanization electrolytic solution consisting of 87-97 wt.% of ZnSO4.8H2O and 3-14 wt.% of (NH4)2SO4 under conditions of 100-300 mA/cm2 current density, 48-52 deg.C temperature of the electrolytic solution and a pH value of the electrolytic solution of 3.5-4, to form a galvanized coating layer having a 5-7 μm thickness.</description><subject>APPARATUS THEREFOR</subject><subject>CHEMISTRY</subject><subject>ELECTROFORMING</subject><subject>ELECTROLYTIC OR ELECTROPHORETIC PROCESSES</subject><subject>METALLURGY</subject><subject>PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2001</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNAJCPJ3CXUO8fT3UwAynV2DgxX83RTcHX3CHP08o1xdFIJDXF19FII9XF1DeBhY0xJzilN5oTQ3g5Kba4izh25qQX58anFBYnJqXmpJvFeAkYGBoaGxobmlgaMxUYoA8OQlrQ</recordid><startdate>20010515</startdate><enddate>20010515</enddate><creator>BOKU KENSHU</creator><scope>EVB</scope></search><sort><creationdate>20010515</creationdate><title>PRODUCTION PROCESS OF GALVANIZED STEEL SHEET</title><author>BOKU KENSHU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2001131790A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2001</creationdate><topic>APPARATUS THEREFOR</topic><topic>CHEMISTRY</topic><topic>ELECTROFORMING</topic><topic>ELECTROLYTIC OR ELECTROPHORETIC PROCESSES</topic><topic>METALLURGY</topic><topic>PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS</topic><toplevel>online_resources</toplevel><creatorcontrib>BOKU KENSHU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>BOKU KENSHU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PRODUCTION PROCESS OF GALVANIZED STEEL SHEET</title><date>2001-05-15</date><risdate>2001</risdate><abstract>PROBLEM TO BE SOLVED: To establish galvanization conditions effecting high rust inhibitory performance of a galvanized coating layer by appropriately controlling the temperature, pH, current density and galvanized coating layer thickness in an electrolytic solution consisting of a zinc sulfate hydrate and ammonium sulfate, in a production process of a galvanized steel sheet. 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subjects APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
title PRODUCTION PROCESS OF GALVANIZED STEEL SHEET
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