... Abstract Weld overlay of the UNS K1157 (ASME SA213-T11) boiler tubes is required in coal fired boilers operating in a low-NO? combustion mode to prevent excessive corrosion of the pressure tubes. When retrofitting boilers to a low-NO? combustion mode (to reduce emissions), it was found...

... Abstract Corrosion tests were carried out to determine the effect of iron content on localised corrosion and stress corrosion cracking (SCC) resistance of Ni-Cr-Mo alloy weld overlays (i.e. Alloy 625) in H2S environments. In addition, the influence of iron content on the fatigue crack growth...

... Abstract Corrosion tests were carried out to determine the effect of iron content on localised corrosion resistance of Ni-Cr-Mo alloy weld overlays (e.g. Alloy 625) in chloride ion-containing environments. A range of iron contents (i.e. 5 – 50%) were examined using coupons extracted from weld...

... of dilution. Finally, a direct comparison has been characterized by a third party nuclear repair company between UNS N06055 and N06054 when the latter was attempted to be qualified for a European structural weld overlay (SWOL) application. The discussion highlights the detailed light optical microscope (LOM...

... Abstract The corrosion resistance of Ni-base weld overlays including Ni-Cr-Fe, Ni-Cr-Mo and Ni-Mo alloys was evaluated in immersion tests in the 80 wt.% H 2 SO 4 at 150 0 C (302 0 F) for 48 hours. Test results in terms of corrosion rates based on the mass loss data are presented. Internal...

... Abstract A case study detailing the condition assessment of a three-level underground parking garage, this paper describes the technical challenges involved with evaluating corrosion in a structural slab beneath a thick, unbonded overlay. The investigation of this structure was part...

... these carbon or Cr-Mo steel waterwall tubes is the application of sulfidation-resistant weld overlay claddings. For some supercritical units, corrosion attack can take the form of preferential sulfidation penetration which could lead to circumferential cracking in waterwall tubes. Superheaters and reheaters...

... generated for materials designed to resist the rigors of high temperature corrosion in coal fired boilers. These results and experiences will be discussed, with particular emphasis upon weld overlay materials. Physical and mechanical properties which enhance the performance of such materials in boiler...

... Corrosion Inhibition water management Production Chemistry oilfield chemistry materials and corrosion riser corrosion BmoB flowline corrosion Health & Medicine H2S management Corrosion Management isolation SRB growth incubation Haloanaerobium bmow Deltaproteobacteria overlay College...

... INTRODUCTION ABSTRACT Two commercially available tungsten carbide-based, Ni alloy binder PTAW overlays which had both previously exhibited excellent resistance to slurry erosion (in substantially non-corrosive conditions) and abrasion were assessed in a more corrosive wear slurry environment...

... ABSTRACT Alloy 625 (UNS N06625) has successfully been used as a weld overlay for many years in waste-toenergy systems to combat corrosion. UNS N06625 will likely remain the preferred alloy for the most aggressive regions of the boiler; however there are other regions in the system where leaner...

... flowline corrosion Subsurface Corrosion riser corrosion erosion-corrosion test overlay mechanism erosion-corrosion performance materials and corrosion Upstream Oil & Gas resistance high sand concentration WC Fe overlay matrix phase sand concentration WC grain fracture...

... ABSTRACT The use of corrosion resistant weld overlay materials has proven to be a very effective method to extend the life of boiler tubes in coal fired boilers. In order to properly select the best material to use for a weld overlay, the corrosive conditions need to be understood...

... installed in four different ports at approximately the same level of the WTE boiler. A total of twelve sensors were tested, six with electrodes using the carbon steel boiler tube material, and six using the nickel-chromium weld overlay alloy for the electrodes. Corrosion rates and temperatures...

... the design of the rig and the associated test procedure. Results are presented for a range of materials, including tungsten carbidebased overlays, chromium carbide-based overlays and non-metallic materials. INTRODUCTION Material loss due to impact damage is one of the common wear mechanisms experienced...

...) evaluation system and (2) compiling E-C maps using data from separate slurry erosion and static corrosion tests. Using slurries containing 3.5wt% NaCl solution and 20wt% silica sand, the SPEC system confirmed that bi-metallic high Cr steel pipe product and WC/Stellite 21 PTAW overlay have provided...

... inner surface of HP-mod or 35Cr/45Ni base tubes. The carburization behavior of these furnace tubes has been evaluated in the commercial furnaces for over 6 years as well as under accelerated conditions in a laboratory. The results show that if the PPW overlay was applied, no carburization was observed...

... ABSTRACT Corrosion resistant alloy (CRA) weld overlay of boilers began in the late 1970's and early 1980's when waste-to-energy (WTE) boilers needed protection. At that point in time, filler metal 625 (ERNiCrMo-3) was enjoying tremendous popularity. It was only natural that this solid solution...

... ABSTRACT The use of corrosion?resistant weld overlays is now commonly used to reduce corrosion of boiler tubes in low NOx coal fired boilers. Alloys with higher chromium contents are the most resistant to corrosion in this type of service. A new alloy with high chromium has recently been...

... ABSTRACT Fossil fuel fired boilers and circulating fluidized bed boiler tubing in the power industry are normally protected against corrosion using nickel based clad coatings. Weld overlay is the most common form of cladding that utilizes the pulsed gas metal arc welding process, however...