Corrosion protection application of titanium alloy in seawater desalination and shipbuilding industry

The ability of titanium to resist seawater corrosion is better than all other metals, whether in static or high-speed flow of seawater titanium has special stability. Therefore, titanium is an ideal material for desalination plants. The number of applications of titanium in this field will be increasing. Titanium resistance to seawater and sea air corrosion ability is very strong, but also strong, light weight, is the ideal structural material in the shipbuilding industry, has been widely used in a variety of ships, deep-water submarine many parts.

At present, seawater desalination has spread to more than 60 countries and regions in the world, and there are more than 6 million desalination plants in the world, and the daily output of seawater desalination is about 35 million tons, and it is increasing at a rate of more than 10% per year. Seawater desalination has become one of the best ways to solve the problem of water shortage. At present, there are three main desalination methods in the world: multi-stage flash distillation (MSF), low temperature multi-effect distillation (LT-MED) and reverse osmosis membrane method (RO). Each of the three methods has its own advantages and disadvantages, and the applicable conditions and scope are different. China is mainly the application of LT-MED and RO two methods, in the next few years, China will have a number of desalination projects started. In the next 3-5 years, desalination will have a lot of room for development.

Depending on the current technology for the large-scale application of seawater desalination has a cost advantage, compared with the south to north water diversion for tons of water cost is lower, the state issued a series of encouraging policies, the next 10 years, the scale of seawater desalination will be 5 times the current. Seawater desalination equipment with titanium alloy instead of copper alloy is the future trend. The multi-directional advantage of titanium determines the future in the field of desalination pipe wide application space, is expected in the next decade, China's desalination titanium pipe demand is about 9500-23520 tons, the world is about 14063-2812,500 tons. Although the initial domestic demand is not large, domestic demand only accounts for 1.6% of the total international demand, it can be said that the overall development space is very huge.