Synthesis and Evaluation of Linseed and Coconut Oils Dervatives as Protective Coating for Outdoor Iron-Based Artefacts

Many strategies for an efficient, ecofriendly, reversable and protective coating preparing were proposed in last decades for protection of outdoor archaeological metal artefacts. Herein, vegetable oil derivatives (VO) were easy synthesized through one step by reaction of ozonation and amination of triglyceride (TGO) to prepare modified oil coatings (MOC). VO samples, Chemical structure was confirmed using FT-IR and UV. The mitigation power of TGO, and MOC for historic wrought iron (low Carbone steel (LCS)) in 3.5% NaCl solution was evaluated by artificial coupon, This coupon was prepared according to the chemical composition of a historical iron-based lamp post located at the Al-Shanawi Palace in Mansoura city, Dakahlia Governorate, Egypt, as an applied example for archaeological study." Electrochemical measurements, such as Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PDP) techniques, were employed for this evaluation. The coated film underwent several tests, including a salt spray test, adhesion test, and aging test, based on ASTM standards. The protective capacity of the linseed oil of MOC increased to 75.6%, reflecting the blocking of active metal sites through the coating process.