DIN 8236-1-1970 精密记时计测定术语.第1部分:速率指示

作者:标准资料网 时间:2024-05-16 18:19:01   浏览:8520   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:ChronometricTerms;Indication,Rate
【原文标准名称】:精密记时计测定术语.第1部分:速率指示
【标准号】:DIN8236-1-1970
【标准状态】:现行
【国别】:德国
【发布日期】:1970-03
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:秒(时间);分(时间);时间计量仪表;定时;时间;时;量值;时间测量;定义;频率;过道(建筑物);缺陷与故障
【英文主题词】:time-measuringinstruments;definitions;time;defects;timemeasurement;frequencies;size;hours;minutes(time);seconds(time);timing;gangways(buildings)
【摘要】:Horologicaldefinitions,indication,rateDéfinitionshorlogères,indication,marcheDienachstehendenBenennungensindweitgehendderTerminologiederUhrentechnikentnommen.DieDefinitionenwurdeninAnlehnunganDIN1319Blatt2undBlatt3(jeweils
【中国标准分类号】:A57
【国际标准分类号】:17_080;01_040_17
【页数】:2P;A4
【正文语种】:德语


下载地址: 点击此处下载
【英文标准名称】:Testingoflubricants;testingofengineoilsintheMWMDieseltestengine;methodBfortestingthecleanlinessofthepiston
【原文标准名称】:润滑剂检验.用MWM测试柴油发动机检验发动机润滑油.测试活塞清洁度的方法B
【标准号】:DIN51361T.4-1987
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
【正文语种】:


【英文标准名称】:StandardGuideforDevelopmentandUseofaGalvanicSeriesforPredictingGalvanicCorrosionPerformance
【原文标准名称】:预测电流腐蚀特性用电流系列的制定和使用的标准指南
【标准号】:ASTMG82-1998(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:G01.11
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:active;corrosionpotential;galvaniccorrosion;GalvanicSeries;noble;passive;Acceleratedaging/testing--corrosion;Aluminum;Aluminumalloys--corrosiontesting;Austeniticsteel;Brass;Bronze;Cadmiummetals/alloys;Conductanceandconductivity(el
【摘要】:Whentwodissimilarmetalsinelectricalcontactareexposedtoacommonelectrolyte,oneofthemetalscanundergoincreasedcorrosionwhiletheothercanshowdecreasedcorrosion.Thistypeofacceleratedcorrosionisreferredtoasgalvaniccorrosion.Becausegalvaniccorrosioncanoccuratahighrate,itisimportantthatameansbeavailabletoalerttheuserofproductsorequipmentthatinvolvetheuseofdissimilarmetalcombinationsinanelectrolyteofthepossibleeffectsofgalvaniccorrosion.Onemethodthatisusedtopredicttheeffectsofgalvaniccorrosionistodevelopagalvanicseriesbyarrangingalistofthematerialsofinterestinorderofobservedcorrosionpotentialsintheenvironmentandconditionsofinterest.Themetalthatwillsufferincreasedcorrosioninagalvaniccoupleinthatenvironmentcanthenbepredictedfromtherelativepositionofthetwometalsintheseries.TypesofGalvanicSeries:OetypeofGalvanicSeriesliststhemetalsofinterestinorderoftheircorrosionpotentials,startingwiththemostactive(electronegative)andproceedinginordertothemostnoble(electropositive).Thepotentialsthemselves(versusanappropriatereferencehalf-cell)arelistedsothatthepotentialdifferencebetweenmetalsintheseriescanbedetermined.ThistypeofGalvanicSerieshasbeenputingraphicalformasaseriesofbarsdisplayingtherangeofpotentialsexhibitedbythemetallistedoppositeeachbar.SuchaseriesisillustratedinFig.1.Thesecondtypeofgalvanicseriesissimilartothefirstinthatitliststhemetalsofinterestinorderoftheircorrosionpotentials.Theactualpotentialsthemselvesarenotspecified,however.Thus,onlytherelativepositionofmaterialsintheseriesisknownandnotthemagnitudeoftheirpotentialdifference.SuchaseriesisshowninFig.2.UseofaGalvanicSeries:Generally,uponcouplingtwometalsintheGalvanicSeries,themoreactive(electronegative)metalwillhaveatendencytoundergoincreasedcorrosionwhilethemorenoble(electropositive)metalwillhaveatendencytoundergoreducedcorrosion.Usually,thefurtheraparttwometalsareintheseries,andthusthegreaterthepotentialdifferencebetweenthem,thegreateristhedrivingforceforgalvaniccorrosion.Allotherfactorsbeingequal,andsubjecttotheprecautionsinSection5,thisincreaseddrivingforcefrequently,althoughnotalways,resultsinagreaterdegreeofgalvaniccorrosion.Note8212;Darkboxesindicateactivebehaviorofactive-passivealloys.FIG.1GalvanicSeriesofVariousMetalsinFlowingSeawaterat2.4to4.0m/sfor5to15Daysat5to30x00B0;C(RedrawnfromOriginal)(seeFootnote5)ACTIVEEND
Magnesium
(x2212;)
MagnesiumAlloys
x2191;
Zinc
brvbar;
GalvanizedSteel
brvbar;
Aluminum1100
brvbar;
Aluminum6053
brvbar;
Alclad