As　fouling　and　corrosion　often　occur　in　the　heat　exchanger　simultaneously,　it　is　difficult　to　research　the　two　problems　separately.　In　this　work,　the　adsorption　behaviour　of　Fe2O3/Fe,　calcite　and　aragonite　on　the　corroded　surface　were　studied　by　molecular　dynamics　and　the　corrosion-fouling　experiment.　The　results　prove　that　the　parameters　of　the　Fe(0　0　1)　surface　can　be　affected　by　the　Fe2O3　corrosion.　The　interaction　energy　between　the　calcium　carbonate　and　substrate　shows　that　both　Fe　and　Fe2O3　surfaces　have　certain　adsorption　effect　on　calcium　carbonate　crystallisation　fouling.　In　addition,　the　adsorption　effect　of　Fe2O3(0　0　1)　on　calcite　during　the　fouling　induction　period　is　three　times　than　that　on　the　Fe(0　0　1)　surface.　Although　the　aragonite　is　prone　to　adhering　to　the　non-corroded　substrate,　the　binding　ability　between　aragonite　and　substrate　is　weaker　than　that　between　calcite　and　substrate.　Moreover,　according　to　the　corrosion-fouling　experiment,　the　precipitate　on　the　surface　of　the　non-corroded　is　mainly　calcite-phase　calcium　carbonate　mingled　with　the　acicular　aragonite-phase　calcium　carbonate.　The　mass　gain　of　fouling　increases　with　the　increasing　corrosion　of　the　substrate.　The　work　provides　evidence　that　the　fouling　nucleation　of　the　calcium　carbonate　can　be　influenced　by　the　corroded　surface.