The application belongs to the technical field of
metal corrosion protection, and particularly relates to a composite gas-phase
corrosion inhibitor for extreme marine atmospheric environment, a preparation method thereof and application thereof in the protection of
metal parts in the field of
offshore wind power, ships, offshore platforms and other
marine engineering. The composite gas-phase
corrosion inhibitor comprises, by
mass fraction, 1-2 parts of
benzotriazole, 3-5 parts of
cysteine, 0.5-1.5 parts of
sodium phytate and 6-8 parts of
cyclohexylamine carbonate. The application forms a stable and dense protective film on the surface of
copper through the synergistic effect of the components, and can effectively block the
coupling erosion of high temperature,
high humidity, high
salinity and strong
radiation in the extreme marine atmospheric environment. Experiments show that the corrosion rate of
copper sheets can be reduced by more than 95% in the simulated extreme marine
atmospheric corrosion liquid. The application has the advantages of strong adaptability to
extreme environment, excellent and long-lasting corrosion inhibition effect,
environmental protection, non-
toxicity, simple preparation, low cost and the like, and is suitable for long-term protection of
copper metal components in the field of
offshore wind power and other
marine engineering, and has a wide application prospect.