Experiments show that the Monel alloy, iron and titanium mesh contact with the formation of galvanic, the corrosion of these materials to speed up, while the titanium mesh is not affected.
Titanium mesh in the iron content of some of the medium in the corrosion resistance of the impact of the reasons for the increase in iron in addition to the reasons for raw materials, often when the welding of iron penetration into the weld, so that the local iron content in the weld increased, At this time the corrosion has a non-uniform nature. When iron is used to support the titanium mesh, iron contamination on the iron-titanium contact surface is almost unavoidable to accelerate corrosion in the iron-stained area, especially in the presence of hydrogen.
When the titanium oxide film on the surface of the pollution occurs when the mechanical damage, titanium mesh and iron contact, due to the surface of the titanium mesh to produce new hydrogen, destroyed the titanium mesh oxide film, not only caused titanium mesh hydrogen embrittlement, but also to speed up the titanium network corrosion Is due to the titanium network has a high degree of activity due to hydrogen. Hydrogen penetrates the metal, according to temperature, pressure and other conditions, the corresponding diffusion of hydrogen, which makes the titanium mesh to produce varying degrees of hydrogen embrittlement. So titanium mesh in the medium temperature and medium pressure and hydrogen system used to avoid surface iron pollution.
