Correlation of content and corrosion protection of volatile corrosion inhibitors in packaging material – regaining trust in VCI
✍ Scribed by S. Eibl; D. Reiner
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- German
- Weight
- 554 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0947-5117
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✦ Synopsis
Abstract
Two representative types of commercial volatile corrosion inhibitor (VCI) packaging materials without a potential for health hazards according to TRGS 615 were investigated: a paper containing ethanol amine and a polyethylene foil containing sodium nitrite as main VCI ingredients. For a variation of VCI concentration the packaging material was thermally treated at 60–100 °C and the amount of VCI remaining was determined after this accelerated desorption. Additionally a nitrite‐free polyethylene foil was impregnated with various amounts of sodium nitrite. Correlations of VCI content – of both the amine and nitrite – with corrosion protection of mild steel were observed. For ethanol amine a color change reaction is proposed to indicate the remaining potential of corrosion protection. This work is aimed at regaining trust in VCI technology.