Common rebar is made of unfinished tempered steel, making it susceptible to rusting. Normally the concrete cover is able to provide a pH value higher than 12 avoiding the corrosion reaction. Too little concrete cover can compromise this guard through carbonation from the surface, and salt penetration.
Quick Answer. Maglev trains can reach speeds of up to 361 mph. This was the fastest speed reached by the MLX01, which was measured on December 2, 2003. Executed on the Yamanashi maglev test line in Japan, the test run was administered by the Central Japan Railway Company and the Railway Technical Research Institute. Keep Learning.
Developers say that maglev trains will eventually link cities that are up to 1,000 miles (1,609 kilometers) apart. At 310 mph, you could travel from Paris to Rome in just over two hours. Germany and Japan are both developing maglev train technology, and both are currently testing prototypes of their trains.