Localized corrosion and high temperature properties of titanium plate

1 , on the electrochemical properties of natural seawater temperature and localized corrosion properties of titanium alloys
Known from the cathodic polarization curve , high oxygen overpotential of titanium , which in general can not be an effective cathode. So that when in contact with other metals, titanium , alloys of accelerated corrosion B30 obvious titanium stockist, 18-8 to increase the corrosion rate is not significant . This can be confirmed from the results of galvanic current measured real sea, when it matches the titanium and titanium alloys resistant stainless steel use will not occur due to rapid acceleration of its electricity occasionally corrosion . This result and the early years of the Soviet Union and other scholars ToraWOB assertion and拉奎laboratory early match.
When the titanium potential is <-700mV (SCE) only when hydrogen absorption , so in our seawater tests have not found one who appears Schlain discussed phenomenon.
From the anodic polarization curve known until the release of oxygen , titanium is also undetectable in seawater break potential. Thus titanium does not appear in natural seawater pitting , crevice corrosion and stress corrosion cracking .
2 , localized corrosion properties of titanium on seawater temperature
As the seawater temperature, oxygen content reduced, resulting in titanium and other corrosion potential in the negative shift. Galvanic current value and the coupling thermal seawater corrosion rate of anode materials have shown a slight change in the condition of 80 ℃ thermal seawater titanium alloy and copper alloy, stainless steel and other corrosion resistant metal contact will not accelerate galvanic action such anode metal corrosion. Moreover, it is smaller than the real sea "dangerous ."titanium strip Temperature reported in the literature in hot titanium crevice corrosion in seawater were 93 ℃, 105 ℃, 110 ℃, 120 ℃, 130 ℃ , etc. , in our experimental conditions the results indicate the following 120 ℃, when no other external seawater when the impact of ions , pitting and crevice corrosion phenomena such localized corrosion will not occur.
Candle -resistant titanium reasons reported in the literature is due from the titanium surface is easy to form a highly complementary surface film , because studies have shown the work without making the mask , temporarily unable to report on whether the reader said .