A series of tetra-alkoxysilanes (silicate esters) were prepared by reacting SiCl4 with appropriate alcohols. The performance of these silicate esters as protectives for mild steel surfaces has been studied by assessing electrochemical potential changes and measuring the percentage protection given by these esters to the plates. The corrosion resistance imported by the silicate esters increases with increasing molecular weight. Among the isomeric esters, branched esters confer better corrosion resistance than their straight chain isomers. Similar measurements were made for uncoated and silicone fluid (MS 550) and paraffin oil coated steel surfaces for the purposes of comparison.
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