...Abstract A FAC (flow accelerated corrosion) test was performed for straight pipe composed of SA335 Gr P22 and SA106 Gr B (SA106-SA335-SA106) including a weld, as a function of the flow rate in the range of 7 to 12 m/s using the FAC demonstration test facility. Afterward, the experimental pipe...

..., compared to weld zones. ASTM E562 ⁽¹⁾ is commonly specified for MPC, in general, and BS4515-2 Appendix B ⁽²⁾ is specifically relevant for welds in duplex stainless steel. ^{4 - 5} The grid size, magnification and number of fields employed are chosen according to the phase...

... the most relevant test method(s) for individual alloys. The existence of different phases in a weld metal compared to those in the parent material should also be taken into account, for example ferrite in austenitic weld metals, no distinction is made in Reference [ 6 ] between different product forms...

...Abstract The effect of ultrasonic nanocrystal surface modification (UNSM) on the corrosion and stress corrosion cracking behavior of welded joint in district heating pipe were investigated. After UNSM treatment, the microstructure of welded joint was transformed from the grain boundary ferrite...

... dissolution depth of metal-gasket crevice specimen was deeper than that of metal-metal crevice specimen. weld steel corrosion stress corrosion cracking polarization INTRODUCTION Under Korea DH heat exchanger conditions, the perforation and crack of 316L plate under gasket have been the causative factor...

...Abstract Multiple leaks occurred in a carbon steel pipe carrying hot condensate water (149 °C and 10.5 bara). All leaks were located downstream of elbows immediately following the circumferential weld. An extensive root cause analysis was performed that included visual and metallographic...

... relieved coupons were milled first before receiving their final surface treatments. Gas Tungsten Arc Welding (GTAW) was performed to lay down successive layers of Co-Cr-W-C weld rod on top of UNS N06600 alloy blocks using 0.125 in (0.32 cm) diameter weld rod. The coupons were cut out of these weld buildups...

... of susceptibility to intergranular stress corrosion cracking (IGSCC) of welded structures. The present study reports on work to develop DL-EPR methodology applied to UNS S30400 SS pipe butt-welds of relatively small size and having fusion zones irregular in shape, both of which present experimental difficulties...

...The purposes of this research are to confirm the effect on SSC resistance at as-welded condition in slightly sour environments, evaluate the SCC susceptibility at elevated temperature, and hydrogen embrittlement in cathodic protection condition. Furthermore, the effect of Mo and Cu on the surface...

..., the susceptibility of such materials to localized corrosion and sulfide stress cracking (SSC) is a major consideration, particularly in the vicinity of welds. A systematic investigation has been carried out into the effect of weld oxide on the SSC susceptibility of UNS S32205 duplex stainless steel by varying...

...The nozzle was originally welded into the carbon steel shell using a Gas Tungsten Arc Welding (GTAW) and shielded Metal Arc Welding (SMAW) weld procedure with an UNS N04400 filler metal followed by post weld heat treatment (PWHT) at 1150°F (620°C) for 6 hrs. Hardness tests indicated the weld met...

...Abstract To achieve good corrosion resistance in a weld is much more challenging than for plate or sheet material, which has undergone controlled rolling, heat treatment and pickling processes in the steel mill. The choice of weld procedure and parameters, filler metal and shielding gas all play...

...Abstract A long seam weld located on the inside radius of a 90° elbow coming out of a hotbox of an ethane cracking furnace, was found to be damaged at the end of 2008. The damage was in the form of cavities. Metal dusting and erosion were determined to be the root causes for the damage. Erosion...

...CORROSION OF WELD METALS IN NUCLEAR POWER ENVIRONMENTS As with other industries, welding is necessary for construction of various components in nuclear power plants. Various welding electrodes and filler metals have been developed for alloys 600 and 690 and some have been modified especially...

.... The effect of strain rate on EAC susceptibility was also conducted at -50 mV_SCE and at the strain rates ranging from 8.3×10^-6 to 8.3×10^-8 s^-1. RESULTS AND DISSCUSSION Electrochemical behavior The potentiodynamic polarization curve of Alloy 182 weld (AW) in 005 M...

...For microstructural examination, the as-welded deposit was electrolytically etched in 5% H₂NO₃ and 95% CH₃COOH solution at an applied potential of 3 V for 100 seconds. A potentiodynamic polarization curve was determined in 0.05 M H₂SO₄ solution...

... of the weld and base metal after exposure at each temperature are shown in Figures 7 and 8 . The same magnification was used to show the increased internal attack with temperature. The internal attack was not uniform at 900°C in either the base metal or the weld, Figures 7a and 7b . EPMA maps...

... of these passed the pre-screening stage and were then formulated into products. Only products with no substitution warning, and a hazard quotient of <1 were considered for corrosion inhibition performance testing. Preferential weld corrosion is the phenomena where particular types of welds are prone...

..., the use of duplex stainless steels in the modem digester houses is justified. According to the manufacturing orders of workshops the welds inside the digester are left unpickled. Thus, the most of the SCC specimens were not pickled before the SCC tests. In order to evaluate the effect of pickling on SCC...

... and microstructure on PWC in CO₂-containing media was investigated on 12 weldments produced in X52 and X65 grade pipe materials using TIG and MMA processes. Corrosion tests were conducted in a re-circulating vessel on segmented weld electrodes in CO₂-containing media, with two levels...