potentially safe natural antioxidants or inhibitors of corrosion the metalon an industrial
scale[1-6]. Antioxidants derived from plants containgenerally, the phenolics which
have manybiological, namely anticancer and antimicrobial, activities. Self-assemble
monolayers (SAMs) preventing corrosion are important for metallic materials in many
industries ranging from electronic and engineering to medical fields owing to their fast
film-forming, high coverage, few defects, favourable efficiency, and low
cost.Numerous organic compounds such as urea-amine compounds, monoterpenoid
phenols, alkanoic and phosphonic acid derivatives, thiol and some other heterocyclic
compounds containing N, S have been employed as self-assembled adsorptive
inhibitors for metal corrosion [2]. However, some synthetic compounds may result in
the environmental pollution, and increase the risk to human health. On the other hand,
nearly every organic compound is not only costly but also toxicousto mankind and the
surroundings. Recently, attention has been turned to exploring cheap, biodegradable,
and environmentally-friendly corrosion inhibitors with excellent effects. However, the
inhibitors extracted from a waste without harm to plants and environmentswere seldom
reported. So, it is an interesting and useful task to find new sources for highlighting
anticorrosive active compounds and to obtain organic compounds for their further used
as self-assembled monolayers. Currently, plant extracts are viewed as an incredibly
rich sources of natural chemical compounds, which can be extracted by simple and
low-cost procedures and are biodegradable in nature. The abundant phytochemical
constituents of plant extracts possess considerable potential as a natural antioxidants
and anticorrosive inexpensive and non-toxic agents.
As one of these sources, we can use products of apricot processing – pomaces.
Apricot fruits (Prunusarmeniaca L.) are valued and highly consumed fruits all over the
world, both for their flavour and for nutritional qualities. In particular, industrial apricot
processing results in the generation of by-products containing valuable organic
compounds that can be extracted and further used for the manufacture of self-
assembled corrosion inhibitor.
Analysis of volatiles compounds in extract of pomaces of the apricot. The
results of photochemical analysis of the 2-propanol extract of apricot pomacesare given
in Table 1, and corresponding GC-MS spectrum is shown in Fig. 1. The composition
of volatile substances of the extract was studiedby mean ofchromatography-and-mass
spectrometry technic, using a FINIGAN FOCUS gas chromatograph. About 10 µl of
the apricot pomace extract sonicated with n-hexane were analyzed by GC-MS using
Shimadzu Model GC-17A equipped with flame ionization detection (FID) and a CBP-
5 capillary fused silica column (25 m, 0.25 mm i.d., 0.22 lm. film thickness). The oven
temperature was held at 50ºC for 2 min then programmed at 10ºC/min to 250ºC, held
for 20 min. Other operating conditions were following: carrier gas was He (99.99%),
inlet pressure was 76 kPa, with a linear velocity of 20 cm/s; injector temperature was
- 1442 -