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.
The V150, a souped-up version of the POS train, was built specifically to break the wheeled rail speed record and did so by clocking in at 357.2 mph (574.8 kph) on the LGV Est line in April 2007. The MLX01 in Japan has this record beat by a mere 4 mph, but the TGV POS still holds the title of fastest wheeled train.