Search Results for weld corrosion

Fig. 38 Optical micrograph at leak location showing selective seam weld corrosion at the bond line of an electric resistance weld. OD outer diameter; ID, inner diameter More

Fig. 16 Stress-corrosion cracks in steel pipe weld. (a) Magnetic particle enhancement of cracks in the weld of an equalizer line elbow section. Cracks were localized in the weld and HAZs. (b) Cracks initiated on the inside surface and propagated through the weld in a multiple branching mode. More

Fig. 5 If a weld joint separates as a result of corrosion, it is difficult to repair to its original structural integrity. Courtesy of the NRPA NPSI More

Fig. 33 Weld overlay intergranular stress-corrosion cracking (IGSCC) mitigation technique. ID, inside diameter; OD, outside diameter More

Fig. 4 Weld overlay cladding of the furnace waterwall for corrosion protection of carbon steel boiler tubes and membranes in WTE boilers. Source: Welding Services Inc. More

Fig. 40 Preferential corrosion of type 316L weld metal where aggressive condensate collected in a vapor line More

Fig. 41 Closer view of corrosion of ferrite in weld metal More

Fig. 10 Crevice corrosion under residual slag (S) in IN-135 weld metal after bleach plant exposure. Etched with glycergia. Source: Ref 5 More

Fig. 11 Microfissure corrosion on IN-135 weld metal on an alloy 904L test coupon after bleach plant exposure. See also Fig. 12 . Source: Ref 5 More

Fig. 13 Cross section of a weldment showing crevice corrosion under weld spatter. Oxides (light gray) have formed on the spatter and in the crevice between spatter and base metal. More

Fig. 21 Effect of gas tungsten arc weld shielding gas composition on the corrosion resistance of two austenitic stainless steels. Welded strip samples were tested according to ASTM G 48; test temperature was 35 °C (95 °F). Source: Ref 8 More

Fig. 43 Preferential corrosion of the ferrite phase in the weld metal of Ferralium alloy 255 gas tungsten arc welds in 10% FeCl 3 at room temperature. Base metal was 3.2 mm ( 1 8 in.) thick. More

Fig. 7 Preferential corrosion of autogenous gas tungsten arc weld in Hastelloy alloy B-2 exposed to boiling 60% H 2 SO 4 + 8% HCl More

Fig. 12 Corrosion of the weld metal and the HAZ in Hastelloy alloys (a) C-22 and (b) C-276 in an aerated mixture of 6 vol% H 2 SO 4 + 3.9% Fe 2 (SO 4 ) 3 + other chemicals at 150 °C (300 °F). Source: Ref 11 More

Fig. 15 Plot of corrosion potential and hardness levels versus distance from weld centerline for selected aluminum alloys. (a) Alloy 5456-H321 (5556 filler metal; DCRP-GMAW weld produced in three passes). (b) 2219-T87 (2319 filler metal; DCSP-GTAW weld produced in two passes). (c) 7039-T651 More

Fig. 13 Plot of corrosion potential and hardness levels versus distance from weld centerline for selected aluminum alloys. (a) Alloy 5456-H321 (5556 filler metal; DCRP-MIG weld produced in three passes). (b) 2219-T87 (2319 filler metal; DCSP-TIG weld produced in two passes). (c) 7039-T651 More

Fig. 5 Intergranular corrosion (weld decay) of stainless steel weldments. FZ, fusion zone More

Fig. 13 Intergranular corrosion of a contaminated E-Brite stainless steel weld. Electrolytically etched with 10% oxalic acid. 200×. Source: Ref 47 More

Fig. 13 Pitting corrosion resistance of base metal relative to weld metal placed in 6 wt% FeCI 3 solution for 24 h duration per ASTM 6 48 (method A). Source: Ref 11 More

Fig. 49 Duplex stainless steel 2205 weld showing stress-corrosion crack on the inside diameter of the vessel More