Publication detail

Plasma Chemical Reduction of Model Corrosion Brass Layer Prepared in Soil

ŘÁDKOVÁ, L. FOJTÍKOVÁ, P. PŘIKRYL, R. KRČMA, F.

Original Title

Plasma Chemical Reduction of Model Corrosion Brass Layer Prepared in Soil

English Title

Plasma Chemical Reduction of Model Corrosion Brass Layer Prepared in Soil

Type

abstract

Language

en

Original Abstract

Samples corroded naturally more than two years in the soil in the vertical and horizontal positions, so the corrosion layers were the most similar to the corrosion layer of original archaeological artifacts. The samples were treated in the low pressure (150 Pa) in a hydrogen-argon gas mixture at mass flows of 30 sccm for hydrogen and 20 sccm for argon for 90 minutes. 13 samples were treated. The plasma power was 100, 200, 300, and 400 W in continuous and pulsed mode. Maximum sample temperature was set at 120 °C. The whole process was monitored by optical emission spectroscopy and the obtained data were used to calculate the relative intensity of OH radicals and rotational temperature. The results showed that the higher power had the greater maximum intensity of the OH radicals and rapidly degraded the corrosion layer. Corrosion layer was not completely removed during the reduction, but due to the reactions which occur in the plasma corrosion layer became brittle and after plasma chemical treatment can be removed easily.

English abstract

Samples corroded naturally more than two years in the soil in the vertical and horizontal positions, so the corrosion layers were the most similar to the corrosion layer of original archaeological artifacts. The samples were treated in the low pressure (150 Pa) in a hydrogen-argon gas mixture at mass flows of 30 sccm for hydrogen and 20 sccm for argon for 90 minutes. 13 samples were treated. The plasma power was 100, 200, 300, and 400 W in continuous and pulsed mode. Maximum sample temperature was set at 120 °C. The whole process was monitored by optical emission spectroscopy and the obtained data were used to calculate the relative intensity of OH radicals and rotational temperature. The results showed that the higher power had the greater maximum intensity of the OH radicals and rapidly degraded the corrosion layer. Corrosion layer was not completely removed during the reduction, but due to the reactions which occur in the plasma corrosion layer became brittle and after plasma chemical treatment can be removed easily.

Keywords

Brass, plasma chemical treatment, relative intensity of OH radicals

Released

06.09.2015

Publisher

Padova University

Location

Padova

ISBN

978-88-6938-045-7

Book

6th Central European Symposium on Plasma Chemistry: Scientific Program & Book of Abstracts

Edition number

1

Pages from

94

Pages to

94

Pages count

1

BibTex


@misc{BUT116849,
  author="Lucie {Řádková} and Petra {Miková} and Radek {Přikryl} and František {Krčma}",
  title="Plasma Chemical Reduction of Model Corrosion Brass Layer Prepared in Soil",
  annote="Samples corroded naturally more than two years in the soil in the vertical and horizontal positions, so the corrosion layers were the most similar to the corrosion layer of original archaeological artifacts. The samples were treated in the low pressure (150 Pa) in a hydrogen-argon gas mixture at mass flows of 30 sccm for hydrogen and 20 sccm for argon for 90 minutes. 13 samples were treated. The plasma power was 100, 200, 300, and 400 W in continuous and pulsed mode. Maximum sample temperature was set at 120 °C. The whole process was monitored by optical emission spectroscopy and the obtained data were used to calculate the relative intensity of OH radicals and rotational temperature. The results showed that the higher power had the greater maximum intensity of the OH radicals and rapidly degraded the corrosion layer. Corrosion layer was not completely removed during the reduction, but due to the reactions which occur in the plasma corrosion layer became brittle and after plasma chemical treatment can be removed easily.",
  address="Padova University",
  booktitle="6th Central European Symposium on Plasma Chemistry: Scientific Program & Book of Abstracts",
  chapter="116849",
  howpublished="print",
  institution="Padova University",
  year="2015",
  month="september",
  pages="94--94",
  publisher="Padova University",
  type="abstract"
}