The　effect　of　grain　morphology　and　precipitates　on　mechanical　properties　and　corrosion　behavior　of　two　commercial　7N01　alloys　was　studied　using　transmission　electron　microscopy　(TEM)　and　scanning　electron　microscopy　(SEM)　equipped　with　electron　backscatter　diffraction　(EBSD).　Results　showed　that　the　recrystallization　degree　of　the　outer　surface　of　7N01-I　alloy　was　lower　than　that　of　7N01-II　alloy.　The　main　strengthening　precipitates　of　two　alloys　were　mainly　eta＇　phases.　The　grain　boundary　precipitates　(GBPs)　of　7N01-I　alloy　distributed　discontinuously,　while　those　of　7N01-II　alloy　distributed　continuously.　The　strength　of　two　7N01　alloys　was　similar,　but　the　maximum　corrosion　depth　of　7N01-I　alloy　was　less　than　that　of　7N01-II　alloy,　because　the　discontinuous　GBPs　and　the　lower　recrystallization　degree　of　outer　surface　of　7N01-I　alloy　were　favorable　for　improving　corrosion　behavior.　Different　models　of　strengthening　mechanism　were　discussed,　and　the　corrosion　behavior　was　correlated　with　microstructure.