Corrosion news from abroad

CHROMIUM‐PLATED STEEL BOLTS Fatigue strength after saline immersion. An article in Werkstoffe und Korrosion, October 1964, by F. Bollenrath, reports the effects of a 3% saline solution on tensile fatigue strength of bolts made from two special steels, the bolts being either chromium plated or non‐plated. Tensile fatigue strength was measured after 10 × 106 load cycles with a nominal mean stress of σm = 20 kg/mm2 (see graphs below). Both steels, known as IK 1 and IK 2, have a low carbon content; steel IK 2 has higher contents of C, Si, Mn, Cu and Ti than IK 1.