The indoor environment can constitute a serious health
hazard if buildings are not properly constructed and finished.
Building, finishing and furnishing materials may emit
a large number of volatile organic compounds (VOCs) into
the indoor air. That wood-composite products are among
the sources of formaldehyde emissions is well documented.
Up until now very little has been known about the emission
of VOCs from wood-composite products (Merrill and Steiber
1987; Levin 1992; Sundin and Edenholm 1992; Catananti
et al. 1993; Barry and Corneau 1999).
The aim of this work is the determination of VOC and
formaldehyde emissions from particleboard veneered with
decorative paper foil.
The effect of carbon content, heat treatment and surface treatment of high strength aircraft 0.3C-1Cr-1Mn-1Si-1Ni type steel on susceptibility to pitting corrosion, on hydrogen transport and on hydrogen embrittlement has been studied in acid rain simulated solution. Under open circuit conditions, susceptibility to stress corrosion cracking is associated with susceptibility to pitting corrosion and decreases with decreasing carbon content and at application of shot peening. Susceptibility to hydrogen embrittlement governed by hydrogen trapping is promoted by carbon segregation at boundaries of bainite laths and parent austenite grains. Decrease in the carbon content caused the decrease in hydrogen trapping resulting in increasing resistance to hydrogen embrittlement. Shot peening increased the trapping efficiency within the deformed layer, but the presence of the shot peened layer decreased the hydrogen flux entering the core and thus decreased the susceptibility of the core to hydrogen embrittlement.The shot peened low carbon steel, exhibiting mechanical properties required by the appropriate Standard and high resistance to stress corrosion cracking may be considered to replace the standard 0.3C-1Cr-1Mn-1Si-1Ni steel for the aircraft parts.
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