Integrated anti-corrosion method for water ballast space with complex structure

Abstract

The invention relates to an integrated anti-corrosion method for a water ballast space with a complex structure and belongs to the technical field of corrosion prevention of water ballast spaces of ships, warships and civil ships. The integrated anti-corrosion method for the water ballast space with the complex structure has the advantages that multiple corrosion prevention methods and means are adopted in a combined manner according to the structure, environment and working condition characteristics of a ballast tank part of a ship, advanced corrosion prevention materials and technologies are integrated for solving the corrosion problem of the ballast tank part in many aspects of corrosion prevention material selection, corrosion prevention design, environmental factors, cathode protection, coating protection, insulated isolation, corrosion detection technology and the like, a high-performance heavy corrosion protection coating system, a high-activity sacrificial anode material, an optimized layout plan, a protection effect detection technology and a dissimilar metal galvanic corrosion protection technology are adopted and are synergistic to form an optimized corrosion prevention integrated technology system, a corrosion prevention validity period can reach up to more than 10 years, the protection degree is more than 90%, and safe application performance of the water ballast space is guaranteed.

Description

technical field [0001] The invention relates to an anticorrosion method for ballast water tanks of warships and civil ships, in particular to an integrated anticorrosion method for ballast water tanks with complex structures. Background technique [0002] The ship's ballast water tank is often in the harsh working condition of alternating dry and wet seawater, so the corrosion is very serious, especially some ballast water tanks have very complex structures, and the cabins are composed of various materials. For example, some bulkheads are part of the pressure hull and are made of high-strength steel, while other bulkheads are made of ordinary structural steel. At the same time, there are often some copper alloys (such as copper, B10 and B30 copper-nickel alloys, etc.), stainless steel, or even titanium alloy piping systems in the cabin, which are prone to friction caused by dissimilar metal contact with the steel structure. Galvanic corrosion. In addition, the bulkhead str...

AI Technical Summary

Problems solved by technology

In the past, ordinary epoxy asphalt coatings and zinc alloy sacrificial anodes or ordinary aluminum alloy sacrificial anodes (such as AL-Zn-In-Cd sacrificial anodes) were used for protection. The shell is prone to passivation failure, and the epoxy asphalt coating has a short service life and contains asphalt, which has environmental problems

Therefore, the existing protection methods for ballast water tanks cannot provide effective long-life protection. In addition, there is currently a lack of monitoring of the protection status in ballast water tanks, and these ballast water tanks with complex structures are rarely entered by personnel, and some even Difficult to reach, it is difficult to find the existing insufficient protection in time, there are corrosion damage and potential safety hazards

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