Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.
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AUGUST 2017 VOL. 56, NO. 8 IN THIS ISSUE CORROSION PREVENTION AND CONTROL WORLDWIDE MATERIALS PERFORMANCE A crew prepares to offload galvanic anodes for a cathodic protection (CP) system designed to protect the interior of the wind turbine's monopile. The CP design for this structure had to consider several issues, including the weight and manageability of the anodes for offshore installation, options for mounting the anodes, and hydrogen evolution in a sealed environment. Anode weight was a key concern for the CP system from a personnel- handling standpoint because this installation would require loading anodes onto a sea vessel; lifting them onto the wind turbine's transition piece by a davit crane; placing them inside the monopile; and lowering them into position from the hang-off location inside the structure. See the feature article on p. 28. Photo courtesy of Alex Delwiche, Deepwater EU, Ltd. CHEMICAL TREATMENT 50 Internal Stress Corrosion Cracking of Shale Gas Flowlines Edward Heaver CATHODIC PROTECTION 34 Galvanic Interaction Between Carbon Steel and Copper Concentrate Genny Leinenweber and Luis Cáceres V COATINGS & LININGS 40 The Hidden Damage Done to Protective Coatings Ron R. Raphoon 44 Coatings & Linings Essentials MATERIALS SELECTION & DESIGN 54 Effect of Stress on Hydrogen Permeation for X70 Carbon Steel in Seawater Chuanbo Zheng and Cheng Wang CORROSION MANAGEMENT 60 Corrosion Management and Corrosion Failure Preemption Ali Morshed About the Cover SPECIAL FEATURE 28 Retrofitting Wind Turbine Monopiles with Cathodic Protection Kathy Riggs Larsen 2 AUGUST 2017 MATERIALS PERFORMANCE NACE INTERNATIONAL: VOL. 56, NO. 8 40 28