Copper　metal　is　essential　to　our　production　process,　but　it　is　highly　corrosive　in　an　ammonia　environment　and　must　be　highly　valued.　Anti-corrosion　coating　is　a　simple　and　cost-effective　method　of　preventing　metal　corrosion.　In　this　study,　a　composite　silane　coating　was　prepared　on　copper　using　an　impregnation　method　with　mercaptopropyltriethoxysilane　(TPTES)　as　the　silane　substrate　and　graphene　oxide　(GO)　modified　with　isophorone　diisocyanate　(IPDI)　or　isocyanatopropyltriethoxysilane　(IPTS)　as　filler　to　protect　the　copper　from　ammonia　corrosion.　The　coating　samples　were　hanging　tested　against　ammonia　corrosion　by　setting　up　two　corrosive　environments:　ammonia　gas　and　ammonia　water.　After　20　days　of　corrosion,　the　surfaces　of　the　TPTES/IPDI-GO　and　TPTES/IPTS-GO　coatings　remained　unchanged　under　both　ammonia　environments　and　the　corrosion　rate　was　consistently　low　at　2–3　μm/y.　Additionally,　the　coating　exhibited　high　protective　qualities　according　to　the　electrochemical　impedance　spectroscopy　(EIS)　test　in　a　3.5%　NaCl　solution,　which　is　attributed　to　the　good　dispersion　that　improves　the　densification　and　regularity　of　the　coating.　Meanwhile,　IPTS-GO　has　a　greater　binding　force　with　the　coating　matrix　due　to　the　increased　number　of　reactive　sites,　resulting　in　further　improved　corrosion　protection.　This　study　provides　an　idea　for　research　on　ammonia-resistant　coatings.　©　2024　Elsevier　B.V.