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Coatings and linings
OLR (1988) 35 (6)
543
between water column and bed have a profound influence on these levels. NERC, Inst. for Mar. Environ. Res., Prospect Place, The Hoe, Plymouth PLI 3DH, UK.
C240. Corrosion 88:3408 Miyasaka, M. and N. Ogure, 1987. Stress corrosion cracking of anstenitic cast irons in seawater and brine, and its prevention. Corrosion, 43(10):582588. Stress corrosion cracking (SCC) behavior of austenitic cast irons, ASTM A436 Type 2 and A439 Type D2, in NaC1 solutions was studied. Constant tensile load tests were conducted using smooth round-bar specimens to examine influences of applied stress, alloying elements, temperature, NaCI concentration, dissolved oxygen (DO) concentration, and potential on SCC behavior. In an aerated NaC1 solution, austenitic cast irons show a higher SCC susceptibility in Type 2 than in Type D2. The SCC mechanism is the active path corrosion cracking type; therefore, cathodic protection is the most effective way to prevent SCC. A reduction in stress, increase in Ni content, and a decrease in DO concentration of the solution are also effective ways to prevent SCC. Ebara Res. Co., Ltd., 4720 Fujisawa, Fujisawa City, 251 Japan. 88:3409 Tator, K.B. et al., 1987. Coatings and linings. Mater. Perform., 26(11):9-60; 10 papers. Although over the past five years funds spent on research and development by the coatings industry have reached an all time high, most research
programs are directed toward meeting new legislative requirements which severely curtail the use of lead and other toxic pigments and volatile organic compounds. At the same time there have been major changes necessitated in surface preparation techniques, in particular, blast cleaning. The National Association of Corrosion Engineers has responded by publishing a number of standards and technical reports on new techniques and has set up a training and certification program for inspectors. Technical articles presented here deal with corrosion resistance of nickel alloy liners, weld integrity, cathodic protection of offshore structures, pipeline coatings, rust conversion coatings, acid car corrosion, acid rain on limestone, recovery boiler waterwall composite tubes, and abrasive blast-cleaned surfaces.
0abf) 88:3410 Thomason, W.H., S.E. Pape and Sheldon Evans, 1987. The use of coatings to supplement cathodic protection of offshore structures. Mater. Perform., 26(11):22-27. Field experience has demonstrated the synergism between cathodic protection (CP) and organic coatings for providing long-term corrosion protection. Coated steel with CP has been used to achieve weight and cost savings on offshore structures. For structures in deep water, the weight savings are significant. In areas in which CP design requirements are not well established, the coating/CP system offers special advantages. Conoco's experience with coating/CP systems in the Gulf of Mexico and North Sea is presented along with planned future use of this corrosion control system. Conoco Inc., P.O. Box 1267, Ponca City, OK 74603, USA.
D. SUBMARINE GEOLOGY AND GEOPHYSICS
DIO. Apparatus and methods 88:3411 Bender, Bernice and D.M. Perkins, 1987. SEISRISK llh a computer program for seismic hazard estimation. Bull. U.S. geol. Surv., 1772:48pp. SEISRISK III differs from its predecessor SEISRISK II in that it retains the concept of seismic
source zone, but uses a normal, rather than a uniform, distribution of events within a source zone; provides for a partial 'magnitude smoothing,' which simulates a finer spacing between faults, thus approximating a uniform distribution; and presents the results in two-dimensional arrays in memory. The geometry, source zone computations, fault zone computations, attenuation functions, magnitude intervals, and output options of the revised model
543
between water column and bed have a profound influence on these levels. NERC, Inst. for Mar. Environ. Res., Prospect Place, The Hoe, Plymouth PLI 3DH, UK.
C240. Corrosion 88:3408 Miyasaka, M. and N. Ogure, 1987. Stress corrosion cracking of anstenitic cast irons in seawater and brine, and its prevention. Corrosion, 43(10):582588. Stress corrosion cracking (SCC) behavior of austenitic cast irons, ASTM A436 Type 2 and A439 Type D2, in NaC1 solutions was studied. Constant tensile load tests were conducted using smooth round-bar specimens to examine influences of applied stress, alloying elements, temperature, NaCI concentration, dissolved oxygen (DO) concentration, and potential on SCC behavior. In an aerated NaC1 solution, austenitic cast irons show a higher SCC susceptibility in Type 2 than in Type D2. The SCC mechanism is the active path corrosion cracking type; therefore, cathodic protection is the most effective way to prevent SCC. A reduction in stress, increase in Ni content, and a decrease in DO concentration of the solution are also effective ways to prevent SCC. Ebara Res. Co., Ltd., 4720 Fujisawa, Fujisawa City, 251 Japan. 88:3409 Tator, K.B. et al., 1987. Coatings and linings. Mater. Perform., 26(11):9-60; 10 papers. Although over the past five years funds spent on research and development by the coatings industry have reached an all time high, most research
programs are directed toward meeting new legislative requirements which severely curtail the use of lead and other toxic pigments and volatile organic compounds. At the same time there have been major changes necessitated in surface preparation techniques, in particular, blast cleaning. The National Association of Corrosion Engineers has responded by publishing a number of standards and technical reports on new techniques and has set up a training and certification program for inspectors. Technical articles presented here deal with corrosion resistance of nickel alloy liners, weld integrity, cathodic protection of offshore structures, pipeline coatings, rust conversion coatings, acid car corrosion, acid rain on limestone, recovery boiler waterwall composite tubes, and abrasive blast-cleaned surfaces.
0abf) 88:3410 Thomason, W.H., S.E. Pape and Sheldon Evans, 1987. The use of coatings to supplement cathodic protection of offshore structures. Mater. Perform., 26(11):22-27. Field experience has demonstrated the synergism between cathodic protection (CP) and organic coatings for providing long-term corrosion protection. Coated steel with CP has been used to achieve weight and cost savings on offshore structures. For structures in deep water, the weight savings are significant. In areas in which CP design requirements are not well established, the coating/CP system offers special advantages. Conoco's experience with coating/CP systems in the Gulf of Mexico and North Sea is presented along with planned future use of this corrosion control system. Conoco Inc., P.O. Box 1267, Ponca City, OK 74603, USA.
D. SUBMARINE GEOLOGY AND GEOPHYSICS
DIO. Apparatus and methods 88:3411 Bender, Bernice and D.M. Perkins, 1987. SEISRISK llh a computer program for seismic hazard estimation. Bull. U.S. geol. Surv., 1772:48pp. SEISRISK III differs from its predecessor SEISRISK II in that it retains the concept of seismic
source zone, but uses a normal, rather than a uniform, distribution of events within a source zone; provides for a partial 'magnitude smoothing,' which simulates a finer spacing between faults, thus approximating a uniform distribution; and presents the results in two-dimensional arrays in memory. The geometry, source zone computations, fault zone computations, attenuation functions, magnitude intervals, and output options of the revised model