Abstract
It was shown in [i] that, in the presence of a severe stress raiser such as a crack about 0.1 mm deep, high-strength steels in a stressed state may fracture under the action of corrosion-active environments (water, sodium chloride solution) and in media not corrosive to the steel in a nonstressed state (potassium bichromate solution, a solution of potassium bichromate and sodium carbonate). In this connection, it was suggested in [i] that the adsorption of water at the base of the crack may be the reason for the fracture of the steel in the above cases. Studies of the fracture of stressed specimens of high-strength steel SP-28 having a central, through fatigue crack in neutral sodium chloride solutions showed that fracture occurs in two stages: slow crack growth, associated with local anodic dissolution of metal at the tip of the growing crack, giving way to hydrogen embrittlement.
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