The effects of hygroscopic atmospheric particles are investigated in relation to the corrosion of tin. Surface insulation resistance test boards were directly contaminated both with ambient particles sampled in the field at Milan, Italy, and with pure saline particles generated in the laboratory. An innovative particle deposition device was used to uniformly coat circular spots on to the test board surfaces. Deliquescence and crystallization of the water-soluble compounds were detected by observing the impedance response to varying relative humidity (RH) conditions with a gradual and continuous ramps. The effects of the adsorption/desorption kinetics and of the temperature on the deliquescence and crystallization RH values were also investigated. Leakage current measurements at 5-V dc highlighted the ability of atmospheric particles to promote corrosion and electrochemical migration at RH levels far below condensing conditions (100% RH).

D'Angelo, L., Verdingovas, V., Ferrero, L., Bolzacchini, E., Ambat, R. (2017). On the Effects of Atmospheric Particles Contamination and Humidity on Tin Corrosion. IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY, 17(4), 746-757 [10.1109/TDMR.2017.2771505].

On the Effects of Atmospheric Particles Contamination and Humidity on Tin Corrosion

D'Angelo, L;Ferrero, L
Membro del Collaboration Group
;
Bolzacchini, E;
2017

Abstract

The effects of hygroscopic atmospheric particles are investigated in relation to the corrosion of tin. Surface insulation resistance test boards were directly contaminated both with ambient particles sampled in the field at Milan, Italy, and with pure saline particles generated in the laboratory. An innovative particle deposition device was used to uniformly coat circular spots on to the test board surfaces. Deliquescence and crystallization of the water-soluble compounds were detected by observing the impedance response to varying relative humidity (RH) conditions with a gradual and continuous ramps. The effects of the adsorption/desorption kinetics and of the temperature on the deliquescence and crystallization RH values were also investigated. Leakage current measurements at 5-V dc highlighted the ability of atmospheric particles to promote corrosion and electrochemical migration at RH levels far below condensing conditions (100% RH).
Articolo in rivista - Articolo scientifico
Atmospheric corrosion; crystallization; deliquescence; leakage current; surface insulation resistance; Electronic, Optical and Magnetic Materials; Safety, Risk, Reliability and Quality; Electrical and Electronic Engineering
English
2017
17
4
746
757
8100936
none
D'Angelo, L., Verdingovas, V., Ferrero, L., Bolzacchini, E., Ambat, R. (2017). On the Effects of Atmospheric Particles Contamination and Humidity on Tin Corrosion. IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY, 17(4), 746-757 [10.1109/TDMR.2017.2771505].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/189228
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