ASTM A/AM: Standard Specification for Higher-Strength Martensitic Stainless Steel Plate, Sheet, and Strip. Introduction. Duracorr®/ASTM A should be considered for bridge applications where severe chloride corrosive environments or excessive time of wetness. Designation: A /A M – 01e1 Standard Speciﬁcation for Higher-Strength Martensitic Stainless Steel Plate, Sheet, and Stri.
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VDOT Experience with ASTM A Steel Bridge Fabrication | TRB Annual Meeting
This study has evaluated the galvanic coupling corrosion risk between connection bolt materials with ASTM A structural steel, which has recently emerged for the construction of more corrosion-resistant bridges than weathering steel bridges. Use of A steels containing The greater corrosion resistance of A steel with a more positive corrosion potential does, however, impose a z1010 of galvanic corrosion with the connection bolts in direct electrical contact. A comprehensive experimental investigation measured galvanic coupling current and potential for samples in cells of aerated salt solution, and the aa1010 corrosion risk ranking was validated by visual examinations of bolted steel plates exposed to a salt spray testing chamber.
The galvanic corrosion risk of using B8 class 2 bolts with A steel was found to be much lower than using galvanized A bolts, but B6 bolt material itself experienced severe crevice and pitting corrosion in both simulated salt solution and salt spray testing. Highway bridges currently utilize two types of steel, carbon based grades and weathering steel grades. The steel coating systems have a much shorter service life than steel bridges; e.
Weathering steels were used to attempt to avoid this problem as they form a protective rust corrosion product layer, patina, which can be dense and adherent to steel, during a long-term exposure to the atmosphere. This protective patina can reduce corrosion rate to less than 0. For example, weathering steel has been used as bridge construction material by the Ministry of Transportation of Ontario MTO Canada sinceand it has been used exclusively since then for structural steel components in highway bridges in Ontario 4.
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Galvanic Corrosion Risk Assessment of Bolt Materials in ASTM A Steel Bridges
Rock Mechanics Symposium and 5th U. Proceedings of an international conference Diverless and Deepwater Techology: Proceedings of an international conference Oceanology: Proceedings of an International Conference Submersible Zstm Proceedings of an international conference Subsea Controls and Data Acquisition ‘ ABSTRACT This study has evaluated the galvanic coupling corrosion risk between connection bolt materials with ASTM A structural steel, which has recently emerged for the construction of more corrosion-resistant bridges xstm weathering steel bridges.