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Corrosion Control by water‐soluble extracts from leaves of economic plants
Author(s) -
Rehan H. H.
Publication year - 2003
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.200390034
Subject(s) - chemistry , sodium hydroxide , corrosion , nuclear chemistry , copper , sodium , chloride , lawsonia inermis , aluminium , metal , corrosion inhibitor , chemisorption , adsorption , inorganic chemistry , metallurgy , materials science , organic chemistry , traditional medicine , medicine
Water extracts from leaves of date palm, phoenix dactylifera , henna, Lawsonia inermis , and corn, Zea mays , were tested as corrosion inhibitors for steel, aluminum, copper and brass in acid chloride and sodium hydroxide solutions using weight loss, solution analysis and potential measurements. The inhibition action was found to critically depend on metal type and solution composition. Only, date palm and henna extracts were found highly effective in reducing corrosion rate of steel in acid chloride solutions and aluminum in sodium hydroxide solutions. The inhibition efficiency increased with increasing the concentration of the extract. The inhibition was interpreted in terms of chemisorption of some active ingredients in the leaves according to Temkin isotherm.