Hiroshi Kihira

TL;DR: In this article, a new type of weathering steel containing 30 mass% Ni and 04 mass% Cu was developed, which exhibits good atmospheric-corrosion resistance in an atmosphere containing relatively high air-born salinity.

TL;DR: In this article, the existence of a thin intermediate layer composed of phosphatic rust was found between the outer and the inner layers showing that phosphorus in steel is converted to phosphatic compound during the protective rust formation.

TL;DR: In this paper, the volume distribution of α-FeOOH particles in the rust on mild steel was analyzed at various temperatures from room temperature to 12 K, and it was shown that this continuous volume distribution is favorable for accommodating a closely packed structure in the protective rust layer on weathering steel.

TL;DR: In this article, the authors proposed a method for diagnosing the degree of degradation of a coating film of a painted metal material by dividing the surface of the material into a number of small area zones, measuring impedance of the coating film at each of the zones through an AC impedance measuring technique, determining a statistic distribution and/or a two-dimensional distribution of impedance values measured at individual zones to determine the degree degradation of the film.

TL;DR: In this article, a corrosion detecting probe is used in combination with a known electrochemical measuring apparatus for inspecting corrosion state of a steel material buried in a concrete structure, which comprises a container made of an electrically insulating material and having an open end adapted to be placed in close contact with a surface of the concrete structure.