Fig. 3 The sulfur cycle showing the role of bacteria in oxidizing elemental sulfur to sulfate ( SO 4 2 − ) and in reducing sulfate to sulfide (S 2– ). Source: Ref 12 More

Fig. 4.16 Sulfur print of a steel rail showing regions of sulfur segregation. 1× More

Fig. 9.4 Polarization curve for a stainless steel in a sulfuric acid solution. Source: Ref 20 . ©NACE International 1986 More

Fig. 4.6 When bubbles are retained between the sample and the paper in a sulfur print (see also Chapter 8, “Solidification, Segregation, and Nonmetallic Inclusions,” in this book) regrinding is required before performing a new sulfur print. Otherwise, as the nonreacted regions under More

Fig. 8.47 Sulfur print of the transverse section of a steel ingot with many bubbles close to the surface (the border or “rim” of the print). In this steel, sulfides are formed in a region closer to the ingot center, because the segregated liquid has been pushed from the interdendritic regions More

Fig. 8.64 (a) Sulfur print of the transverse plane of a continuous cast low-carbon steel plate, with chemical composition close to the peritectic point (C = 0.13%, Mn = 0.65%, S = 0.010%, P = 0.017%). Discontinuous central segregation as well as small defects indicated by the lines drawn over More

Fig. 8.65 Portion of a sulfur print taken from the transverse section of a continuous cast slab of low-carbon steel, with the chemical composition close to the peritectic. Small nonmetallic inclusions and “pinholes” (small bubbles) in the small radius of the curved strand (inner side). Cracks More

Fig. 8.75 (a) Manganese and sulfur and (b) manganese and phosphorus characteristic x-ray mapping in longitudinal section of samples subjected to controlled cooling and quenched. Lighter regions indicate higher concentration of these elements and the formation of manganese sulfide More

Fig. 11.13 Sulfur print from the same region as Fig. 11.12 . The “A” segregates are visible in the print. The higher homogeneity of the product in the region between the surface and the “A” segregates when compared to the region between these segregates and the central region of the plate More

Fig. 11.15 Sulfur print from the same region as Fig. 11.14 . The cross section is homogeneous with small dark dots uniformly spread (enhanced by the high-contrast digitizing of the print). More

Fig. 11.16 Sulfur print of a thick rolled plate of structural steel WStE355. Section transverse to the main rolling direction, region corresponding to the top of the conventional ingot used to roll the plate, in mid-width. Some concentration of sulfides can be seen, elongated in the transverse More

Fig. 8.5 Surface morphology of chromic/sulfuric acid etch (FPL). Source: Ref 4 More

Fig. 34 Erosion-corrosion of lead as a function of sulfuric acid concentration. Velocity, 12 m/s (39 ft/s); temperature, 95 °C (203 °F) More

Fig. 17 Corrosion rate of steel as a function of sulfuric acid (H 2 SO 4 ) concentration More

Fig. 18 Corrosion of steel by sulfuric acid as a function of concentration and temperature More

Fig. 21 Comparative behavior of several nickel-base alloys in pure sulfuric acid (H 2 SO 4 ). The isocorrosion lines indicate a corrosion rate of 0.5 mm/year (20 mils/year). More

Fig. 9.8 Cross-linking of rubber molecules by sulfur. Source: Ref 9.1 More

Fig. 24 Stress-corrosion cracking behavior of nickel with phosphorus and sulfur segregation. (a) Polarization curve for nickel in 1 N H 2 SO 4 at 25 °C (77 °F). (b) Strain to failure and percent intergranular fracture for 26% phosphorus segregation at grain boundaries. (c) Strain to failure More

Fig. 1.26 Stress-corrosion cracking behavior of nickel with phosphorus and sulfur segregation, (a) Polarization curve for nickel in 1 NH 2 SO 4 at 25 °C (77 °F). (b) Strain-to-failure and percent intergranular fracture for 26% phosphorus segregation of grain boundaries. (c) Strain-to-failure More

Figure 1-38 Mirror-image sulfur print of the macroetched disc shown in Fig. 1-6 . More