PURPOSE: To produce a rust preventive composition effective for cleaning a iron based material or the like by preparing the rust preventive composition comprised of an amine compound, an inorganic salt of H3BO3 or the like and a hydroxide of alkali metal or the like.
CONSTITUTION: The rust preventive composition comprised of the amine compound (triethanol amine or the like), the inorganic salt selected from a group composed of H3BO3, Na2B4O7, Na2B4O7.10H2O, Na2HPO4, Na2HPO4.2H2O, Na4P2O7 and Na2SiO3 and the hydroxide of alkali metal or alkaline earth metal (NaOH, Ca(OH)2 or the like) is prepared. As a result, the rust preventive composition exhibiting rust preventive effect continuing particularly to the Fe based material for a long period at the time of using for a water soluble rinse solution is obtained.
FUKUDA HIROYUKI
FUKUSHIMA YUMIKO
