logo

底部版权

PAGES COPYRIGHT©2018 DAYOU
渝ICP备16005686号  POWERED BY 300.CN

 

NEWS

重庆大有表面技术有限公司参加2019年中国西部跨国采购洽谈会
重庆大有表面技术有限公司参加2019年中国西部跨国采购洽谈会

重庆大有表面技术有限公司参加2019年中国西部跨国采购洽谈会

2020-04-17
《2019年中国西部跨国采购洽谈会》 西部跨采会是陕西省人民政府主办的三大展之一,已连续举办七届,累计共有80个国家和地区。1900多家国际知名大型采购商和世界500强企业参加。已成为陕西对外开放合作与服务“一带一路”建设的新平台。 本届跨采会是在新中国成立70周年“一带一路”深入推进的背景下举办的行业盛会,将围绕自贸区推进,进口商品、现代服务业、跨境电商、名优农产品等设置专题展区,展览面积超过40000平米。                            公司总经理任玉中在展会中                   公司联合中铁武汉电气化局集团公司合作展出的展台中国铁路工程集团有限公司总经理、党委副书记、执行董事陈云参观我公司展台;
Hand in Hand, Thank You for the New Year Conference of 2017
Hand

Hand in Hand, Thank You for the New Year Conference of 2017

2017-02-08
Thenewyearisfullofnewgoalsandpursuits.Thehopeful2017hasstridedtowardsus.Lookingbackonthepast2016,therearestruggles,perseverance,joy,harvest,andeveryhard-workingyou.OnJanuary25,2017,at3p.m.,ChongqingDayouandRongchangDayouFootballFriendshipTournamentwasinfullswing.Inthecheersofcheerleadersonthesidelines,thetwoteamswillfightbravelyonthegreenfield.Thisisnotonlyapassionateandenthusiasticgame,butalsoashowofperseverance,tenacityandcourage.Italsoshowsustheperseveranceofunitingandadvancinghandinhand.  Intensefootballfriendship  Cheerleaders At5:30p.m.,theNewYearConferenceofChongqing/RongchangDayouSurfaceTechnologyCo.,Ltd.openedwarmly.ChongqingDayouandRongchangDayouallgatheredtogethertocelebratethefestival.Aseachofthesmilesthatgrewupin2016withBigOnesblossomedontheprojectionscreenonebyone,colleagueschantedtheirnamesonebyone.WhenallthesmilesconvergeintoalargenumberofLOGO,theannualmeetingalsousheredinthefirstsmallclimax. Thankyouverymuch. Afterthewarmstart,GeneralManagerRenYuzhongdeliveredaNewYearspeech.Thespeechsummarizedtheachievementsofthecompanyinthepastyear,gavefullaffirmationtotheworkin2016,thankedallthestafffortheireffortsinthedevelopmentofthecompany,alsoputforwardtheobjectivesforthecompany'sbusinessdevelopmentin2017,andextendedfestivegreetingsandblessingstoallstaff.  AddressbyRenYuzhong,GeneralManager  AdvancedEmployeesin2016Subsequently,thecompanycommendedtheadvancedemployeesin2016,andcalledonallcolleaguestolearnfromthem,fulfilltheirdutiesintheirrespectivepositions,developteamspirit,andworktogetherforthefutureofmost.  Sharingfeast  GeneralManagerandSpecialAwardWinnerWuChangyong Thankyouin2016.In2017,wewillworktogethertocreateanothermiracle.
What are the factors that cause metal rust in the rust treatment
What

What are the factors that cause metal rust in the rust treatment

2016-06-21
(1)atmosphericrelativehumidityAtthesametemperature,theatmosphericwatervaporcontentandthepercentageofwatervaporsaturatedcontent,calledrelativehumidity.Inarelativehumiditybelowthemetalcorrosionrateisverysmall,buthigherthanthatofrelativehumidity,thecorrosionspeedsuddenlyincreased.Thisrelativehumidityiscalledthecriticalhumidity.Thecriticalhumidityofmanymetalsisbetween80%and50%,andthesteelisabout75%.TheeffectofatmosphericrelativehumidityonCorrosionofmetalisthebiggest.Whentheairhumidityishigherthanthecriticalhumidity,themetalsurfacewillappearwaterfilmordropsofwater,iftheatmospherecontainingharmfulimpuritiesdissolvedinwater,theelectrolytemembranedrops,aggravatecorrosion. (2)airtemperatureandhumidityTherelationshipbetweenairtemperatureandhumidityaffectsthecorrosionofmetal.Herearesomeofthefollowing:first,theatmosphericwatervaporcontent,withtheincreaseintemperatureandincrease;second,thehightemperaturetopromotecorrosion,especiallyinthehumidenvironment,thehigherthetemperature,thefasterthecorrosionrate.Whentherelativehumidityislow,theeffectofthetemperatureonthecorrosionisnotobvious,butwhenthetemperatureishigherthanthecriticalhumidity,theamountofcorrosionincreasesrapidly.Inaddition,ifthereisadifferencebetweentheatmosphereandthemetal,thetemperatureislowinthemetalsurfaceoftheformationofcondensationwater,butalsoleadtorust. (3)corrosivegasesCorrosivegaspollutionintheair,withthegreatestimpactofsulfurdioxideonmetalcorrosion,especiallytheharmespeciallytosteel,copperanditsalloys.Sulfurdioxideintheatmosphereismainlyderivedfromthecombustionofcoal.Atthesametime,thecombustionproductsofcarbondioxidealsohasacorrosiveeffect.Corrosivegasesmixedintheatmospherearoundtheplant.Suchashydrogensulfide,ammonia,hydrochloricacidgasandsoonarethefactorstopromotethecorrosionofmetal.Ofcourse,theatmosphereofoxygeninthemetalcorrosionisthemostcommon,andatanytimeanywhere,itisself-evident. (4)otherfactorsTheatmospherecontainsalotofdust,suchassmoke,ash,chlorideandotheracid,alkaliandsaltparticles,someitselfiscorrosive,orwatercondensationnuclei,arealsofactorssuchascorrosion,corrosionofmetalchloridesareconsideredas"enemies".