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.
That beat the old record of 581 kilometers per hour (361 miles per hour), which was set in 2003 during another Japanese maglev test. Right now, China operates the world's fastest commercial maglev, which has hit 431 kilometers per hour (268 miles per hour) on a route through Shanghai.