<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>SrNiP<sub>2</sub>O<sub>7</sub> (SNP) is prepared by solid state reaction of stoichiometric amounts of SrCO<sub>3</sub>, NiCO<sub>3</sub>, and (NH<sub>4</sub>)H<sub>2</sub>PO<sub>4</sub> (1123 K, 10 h) and used in concentrations of 20‐180 mg/L in seawater corrosion tests.</p> </abstract>