Weathering Steel (WS) is low alloy steel that has been using as un-painted
steel in mild atmosphere due to forming protective layer of corrosion product
(rust) on steel substrate, which can act as a protective barrier against the inward
transportation of corrosive species. Using the WS on steel structures reduces the
material cost, especially reduces maintenance cost of anti-corrosion whichis
effectively applied WS to works of transportation, bridges, works of the
century.
WS has been used popular in temperate zones due to its corrosion resistance.
However, the WS types have just stated using in Vietnam. The possibility to
apply of the weathering steel in the humid tropical climate with heavy rain of
our country has not been fully and systematically researched. So, in order to
build the scientific bases of applying WS to construction works, highway
bridges, works of the century, . in Vietnam, and provide the necessary
information for selecting and using effectively WS (Corten B) in each climatic
region, the author selected the thesis titled: “Study on the formation and
corrosion protectiveness of rust layer on weathering steel in tropical
atmosphere of Vietnam