Atomic force microscopy study on the effect of low-pressure hydrogen plasma cleaning on stainless steel weights

R. Högström, K. Riski, M. Ojanen, M. Heinonen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)

    Abstract

    Despite the new definition of the Kilogram, physical weights prone to contamination will still be used in the dissemination of the unit. Cleaning is applied to bring the weight surface to a well-defined state to allow predictable adsorption behaviour. Currently used mechanical cleaning methods show poor reproducibility. Therefore, non-contact cleaning techniques such as plasma cleaning have been introduced. In this study, the applicability of low-pressure hydrogen plasma for cleaning stainless steel weights was studied using atomic force microscopy (AFM) and gravimetric weighing. Results show that hydrogen plasma effectively removes surface contamination without damaging the surface. Successive ultrasonic cleaning in ethanol did not considerably reduce surface contamination.

    Original languageEnglish
    Title of host publication22nd IMEKO TC3 International Conference on Measurement of Force, Mass and Torque 2014, Held Together with TC5 and TC22
    PublisherInternational Measurement Confederation IMEKO
    Pages17-20
    Number of pages4
    ISBN (Print)978-163266728-1
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    Event22nd IMEKO TC3 International Conference on Measurement of Force, Mass and Torque 2014, Held Together with TC5 and TC22 - Cape Town, South Africa
    Duration: 3 Feb 20146 Feb 2014

    Conference

    Conference22nd IMEKO TC3 International Conference on Measurement of Force, Mass and Torque 2014, Held Together with TC5 and TC22
    CountrySouth Africa
    CityCape Town
    Period3/02/146/02/14

    Keywords

    • AFM
    • Hydrogen plasma cleaning
    • Stainless steel weight
    • Surface contamination

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