Showing papers in "Materials protection in 1967"
Journal Article•
TL;DR: In this article, the authors designed a questionnaire to determine if a predicated threshold for the occurrence of corrosion of a piece of steel is real and whether a threshold exists.
Abstract: THE TESTS DESCRIBED IN THIS PAPER WERE DESIGNED TO: IDENTIFY THE MECHANISM BY WHICH CORROSION OF STEEL IS INITIATED, PROVIDE QUANITATIVE INFORMATION ABOUT THE EFFECTS OF CHLORIDES, AND DETERMINE IF A PREDICTABLE THRESHOLD OF CORROSION EXISTS LABORATORY STUDIES ARE REPORTED ON THE CORROSION OF BARE STEEL RODS IN ENVIRONMENTS SIMULATING POROUS CONCRETE CONTAMINATED WITH CHLORIDES THE INITIATION OF CORROSION IS SHOWN TO REQUIRE FREE OXYGEN AT THE STEEL SURFACE AND A RATIO OF CHLORIDE TO HYDROXYL ION ACTIVITY OF AT LEAST 06 A PROBABILITY MODEL IS USED TO EXPLAIN THE CHLORIDE EFFECT AND TO PREDICT THE THRESHOLD VALUE CAUSING CORROSION /AUTHOR/
249 citations
Journal Article•
TL;DR: In this article, the authors discuss the effect of the thickness of concrete mortar-coated steels on their performance in providing robustness against corrrosion protection to steel.
Abstract: THE EFFECT OF THICKNESS OF CEMENT MORTAR COATINGS IN PROVIDING CORROSION PROTECTION TO STEEL IN PRESTRESSED CONCRETE PIPE IS DISCUSSED. IN ADDITION, THE AUTHOR PRESENTS RESULTS OF ANALYSES IN DETERMINING TO WHAT DEGREE COATING THICKNESS AFFECTS THE COATINGS PERFORMANCE IN PROTECTING REINFORCING STEEL. GENERALLY SPEAKING, INCREASING THICKNESS OFFERS INCREASED PROTECTION, BUT THIS BENEFIT FOLLOWS A LAW OF DIMINISHING RETURNS. CORROSION OF MORTAR COATED STEEL APPEARS TO BE CATHODICALLY CONTROLLED, WITH THE DIFFUSION OF OXYGEN THROUGH MOIST OR SATURATED MORTAR DETERMING THE CORROSION RATE. /AUTHOR/
2 citations
Journal Article•
TL;DR: In this paper, an understanding of the ELECTROCHEMICAL Theory of CORROSION, experience in the recognition of the VARIOUS TYPES OF CORROSSION, a knowledge of FERROUS and NONFERROUS MATERIALS /INCLUDING PLASTICS, PAINTS, WOOD, GLASS, and CERAMICS, and a FAMILIARITY with the TECHNICAL SOCIETIES and TECHNical LITERATURE DEALING with these FIELDS
Abstract: THE COST OF CORROSION, IN MANY INSTANCES, CAN BE AND SHOULD BE REDUCED IN THE DESIGN STAGE. AN UNDERSTANDING OF THE ELECTROCHEMICAL THEORY OF CORROSION, EXPERIENCE IN THE RECOGNITION OF THE VARIOUS TYPES OF CORROSION, A KNOWLEDGE OF FERROUS AND NONFERROUS MATERIALS /INCLUDING PLASTICS, PAINTS, WOOD, GLASS, AND CERAMICS/, AND A FAMILIARITY WITH THE TECHNICAL SOCIETIES AND TECHNICAL LITERATURE DEALING WITH THESE FIELDS WILL AID CONSIDERABLY IN MINIMIZING CORROSION AND MAXIMIZING THE SERVICE LIFE OF PLANT AND EQUIPMENT. AMONG SUBJECT AREAS COVERED ARE WELDING, AUTOMOBLE, RAILROAD CARS, CHEMICAL PLANTS, CATHODIC PROTECTION, AND PROTECTIVE COATINGS. /AUTHOR/
1 citations
Journal Article•
1 citations