And Russia has staked a claim by sending a submersible to plant a corrosion-resistant titanium flag some 4km below the North Pole.
俄国通过派遣一艘潜艇在北极水下大约4公里处安置一面耐腐蚀的钛制旗子，表明其所有权。
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Researchers spent three years developing the Zafirro Iridium, which has a handle made of 99.9 per cent pure iridium - the most corrosion-resistant platinum metal, found only in meteorites.
High purity water systems are primarily composed of austenitic stainless steel (ss) materials due to their corrosionresistant and contaminant free properties.