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Surface treatment of high-strength bolted joints
Effect of galvanizing on ASTM A325 and A490 high-strength bolts and performance of bolted joints under static loads in which faying surfaces were galvanized, cold zinc painted, metallized, treated with vinyl wash or with another rust-preventing paint, were studied; comparisons were made with nongalvanized bolts and with joints with untreated mill-scale surfaces; torque necessary to tighten high-strength bolts is increased by galvanization, but this effect may be almost eliminated by use of power torquing, or by lubrication; hot dip galvanizing gave average coefficient of friction of 0.23; other surface treatments gave values between that of dry mill-scale and that of sandblasted metal surfaces.
Surface treatment of high-strength bolted joints
Effect of galvanizing on ASTM A325 and A490 high-strength bolts and performance of bolted joints under static loads in which faying surfaces were galvanized, cold zinc painted, metallized, treated with vinyl wash or with another rust-preventing paint, were studied; comparisons were made with nongalvanized bolts and with joints with untreated mill-scale surfaces; torque necessary to tighten high-strength bolts is increased by galvanization, but this effect may be almost eliminated by use of power torquing, or by lubrication; hot dip galvanizing gave average coefficient of friction of 0.23; other surface treatments gave values between that of dry mill-scale and that of sandblasted metal surfaces.
Surface treatment of high-strength bolted joints
ASCE -- Proc (J Structural Div)
Brookhart, G.C. (author) / Siddiqi, I.H. (author) / Vasarhelyi, D.D. (author)
1968
11 pages
Article (Journal)
English
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