.... However, due to the harsh nature of the fuel gases and the associated high temperatures, the service life of 304L SS is often shorter than desired. In particular, longitudinal welds in these hoses become susceptible to corrosion that can eventually lead to leakage. This paper describes the failure...

... material for fabricating the overpack. Its nominal chemical composition is listed in Table 1 . Material EXPERIMENTAL PROCEDURE This paper discusses the SCC behavior of plain and welded (gas metal active welding, submerged arc welding, electron beam welding) UNS K02700 grade mild steel exposed...

..., it is amenable to various welding processes, notably gas metal arc (GMAW/MIG), gas tungsten arc (GTAW/TIG), and shielded metal arc (SMAW) with suitable coated electrodes. ⁷ The GMAW and GTAW processes are typically used during the fabrication of components, under controlled factory conditions...

...Corrosion testing Inhibited ferric chloride test Corrosion testing was performed on welded samples and base material in an inhibited ferric chloride solution comprising 5 wt% FeCl₃ + 1 wt% NaNO₃ according to ASTM A1084 Method C. ⁶ The samples were cut...

...Abstract Despite the selection of materials that have good corrosion resistance in light water reactor (LWR) environments – austenitic stainless steels, Alloy 600 and their weld metals – there has been a significant incidence of stress corrosion cracking (SCC) in many components in both boiling...

...Following the plastic strain cycle, the weld segments were subjected to artificial aging for a period of 1 hour at 250°C. Abstract The use of weldable 13%Cr supermartensitic stainless steel (SMSS) for flowlines is becoming more widespread, largely due to its attractive price, high strength...

..., and some examples are discussed. New forms of degradation and aging synergies that accelerate the kinetics of known degradation phenomena are considered. Stress corrosion cracking light water reactors structural materials welds water chemistry extended plant life INTRODUCTION Stress corrosion...

.... These include an elevated strength-to-density, low elastic modulus, and exceptional resistance to corrosion and corrosion fatigue in seawater and sour environments even at high temperatures. Recently published laboratory S-N testing of Grade 29 titanium Gas Tungsten Arc-welded riser pipe specimens in air vs...

... ^{, 10 )}. Furthermore, S-N fatigue and FCG rate testing of Grade 29 Ti welded pipe joint strip samples in aerated seawater conducted up to 150°C (302°F)^{( 8 , 11 )} also indicate no significant influence of environment on fatigue life. Although titanium alloys exhibit elevated resistance...

.... The absorption of hydrogen into titanium can lead to the formation of brittle titanium hydrides, which decrease the fracture toughness of the metal. Weldments of dissimilar titanium alloys can be especially susceptible to hydride cracking. Titanium vessels, which include titanium welds, have been proposed...

...Each specimen was given a unique number (2, 3, 4, 5, 6, 10, 11, 12, 13) and the weld was chemically analyzed. From the chemical analysis, the weld dilution was calculated using equation 1 . It should be noted that the dilution here refers to percentage of UNS N08367 in the weld metal. The dilution...

..., on a wide variety of test panels with welds and edges. Indeed, the subtle balance of the organic / inorganic hybrid offers a range of properties such as adhesion (to new and aged coatings), high gloss and outstanding durability exceeding that of industrial polyurethane finishes. Versatility is combined...

... . Although the welds generally constitute a very small portion of the total surface area of a component, welds are generally thought to be weak points, and thus favorable sites for localized corrosion initiation ^{9 - 22} . The different zones in welds are microstructurally distinct from one another...

... the temperature from 100 to 160°C increases E_corr values, while breakdown potentials and repassivation potentials peak at 130°C for the 0.5 nitrate to chloride ratio electrolytes. Alloy 22 localized corrosion nitrate chloride welds deliquescence INTRODUCTION Alloy 22 is a nickel-based alloy...

...Abstract In systems carrying freshwater, Mo-bearing stainless steels (type 316) are not more corrosion resistant compared to the Mo-free material (type 304) at welds. Two such observations were investigated and are discussed with respect to “ennoblement” and the cathodic properties...

...corrosion carbon dioxide carbon steel welds inhibition INTRODUCTION Review of literature data and field experience indicate that preferential corrosion of pipe weldments is a problem of some concern to the oil and gas industry. ^{1 - 8} Very little work related to inhibition...

.... The preferential attack at the heat tinted welds is explained by the potential shift caused by biomineralized MnO₂, preventing repassivation. MIC ennoblement manganese dioxide stainless steel welds INTRODUCTION Stainless steel (SS) is the material of choice in many systems carrying fresh water...

...Abstract Steel catenary and top tension risers for deepwater oil and gas field developments are subject to corrosive environments on both internal and external surfaces and to fatigue loading. The girth welds control, the fatigue life of such structures. Therefore, there is a need to quantify...

... corrosion MIC monitoring planktonic sessile stainless steel visual welds INTRODUCTION Bacterial corrosion in water systems can be rapid yet still be difficult to confirm as such. Failure to culture microbes associated with corrosion from a suspect system can delay or even prevent corrective...

... of materials at and near the welds and joints from preferential corrosion and, especially, under conditions of high flow and high sheer. Additionally, successful application to gas production can also be difficult, as most inhibitors are designed to be oil and / or water-soluble. This paper outlines...