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Abstract

The coulometric-weighing test method was established and applied to determine the tin coating mass for electrolytic timplate. The effects of electric quantity, the current efficiency and the electrochemical equivalent in the coulometric test method were overcome. the inaccuracy in the determination of final point at the anodic dissolution curve in the weighing method was avoided when applied to the electrolytic timplate, higher accuracy was obtained, the SD is less than 0.04 g/m~2,RSD is as small as 0.36%.

Keywords

Coulometric-weighting test method, Coating mass determination, Electrolytic tinplate

Publication Date

2004-02-28

Online Available Date

2004-02-28

Revised Date

2004-02-28

Received Date

2004-02-28

References

[1] SongZhi_di.CoatingThicknessMeasurementTechnology[M].Beijing:PressofWaterResourcesandElectricPower,1992.
[2] LiGuo_ying.SurfaceEngineeringHandbook[M].Beijing:ChinaMachinePress,2001.
[3] DongXiu_wen,LinGuo_wei,LiuJian_guo,etal.Intelligenttinplatecoatingmassanalyzer[P].China:ZL01272056.9,2002_11_20.
[4] JISG3303_1987,TinplateandBlackplate[S].
[5] ASTMA630_1998,StandardTestMethodsforDeterminationofTinCoatingWeightsforElectrolyticTinPlate[S].
[6] SongMing_sun.UncertaintyinMeasurementandItsPractice[M].Beijing:ChinaMetrologicalPress,2000.
[7] GB/T4955_1997,MetallicCoatingsMeasurement_CoulometricMethodbyAnodicDissolution[S].Beijing:StandardsPressofChina.

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