... welds. Welding Purging gas Heat tint Duplex Stainless Steel Titanium Pitting Corrosion Seawater systems Hydrocarbon systems INTRODUCTION CRAs are used in the oil and gas industry to provide long term resistance against internal corrosion in process and utility systems containing e.g...

... Surface Average Corrosion Pitting Corrosion Immersed Level 1 Level 2 Level 3 Immersed Level 1 Level 2 Level 3 Vessel 1 (100% VCI-A) 0.01 0.29 0.10 0.20 0.03 0.01 0.05 0.09 Vessel 2 (100% VCI-B) 0.00 0.01 0.03 0.25 0.01 0.00 0.03 0.03 Vessel 3 (50% VCI-B) 0.01...

.... UNS N08935 Pitting Corrosion Crevice Corrosion Seawater Chlorination Stainless Steels CRA UNS N06625 Nickel Base Alloys INTRODUCTION UNS N08935, Sanicro®35 ^† , is a new alloy with composition 35Ni–30Fe-27Cr-6.5Mo-0.28N, with a high pitting resistance equivalent number (PREN) of 52...

... monitoring. Vapor Corrosion Inhibitors Hanford Double Shell Tanks Bottom Plate Pitting Corrosion INTRODUCTION Electrical resistance (ER) based corrosion monitoring probes are sometimes used to monitor soil-side corrosion of Aboveground Storage Tanks (ASTs). Lyublinski et al. ¹ and Whited et...

... G48 A, C and D. Nickel Alloys Alloy UNS N08825 Alloy UNS N08827 Alloy 825 CTP Crevice corrosion Pitting corrosion weldability In order to improve resistance to chloride-induced localized corrosion, the chemical composition of Alloy UNS N08827 (herein called Alloy 825 CTP) has been optimized...

...316L pitting corrosion EBSD INTRODUCTION Selective laser melting is an additive manufacturing (AM) process capable of making geometrically complex metallic parts utilizing computer-aided design (CAD) programs ^{1 , 2} . The basic principle is the use of a ‘layer-by-layer’ forming...

... is expected to be between 9 and 10 in the range of temperatures between 75 and 125 °C. Pitting Corrosion Testing The influence of the surface conditions on the pitting corrosion susceptibility of AM718 was determined by electrochemical methods including open-circuit potential (OCP) measurements and cyclic...

... ¹⁵ Method A, which is an exposure test in ferric chloride solution and intended to determine the relative pitting corrosion resistance of stainless steels, might also be used to specify requirements for pitting corrosion resistance in grades used in NMDCs. Ricci et al suggested the adoption...

...These formulas give a global ranking of the pitting corrosion resistance of the materials. However, they do not predict whether a given material will be susceptible or not to pitting corrosion in seawater at a given temperature. Material selection must also be driven by the risk of crevice...

...) Quality assurance Oil & Gas Pitting corrosion INTRODUCTION Failure Analysis The damage mechanism attributed to the failure of DSS tubes was pitting corrosion ( Figure 3 and Figure 4 ). The laboratory analysis has shown that all the mechanical properties (Hardness, tensile strength, impact etc...

... of other alloys traditionally used by the oil and gas and chemical processing industries. Alloy 642 pitting corrosion stress corrosion cracking intergranular corrosion phase stability weldability impact energy clad pipe INTRODUCTION UNS ⁽¹⁾ N06625 (alloy 625) is one of the most commonly...

... pitting corrosion. ^{12 - 14} EXPERIMENTAL PROCEDURE Two kinds of tests were performed: Electrochemical testing (potentiodynamic polarization) and immersion testing (weight loss). Test Environment Two solutions at ambient temperature were used for testing - potable water and potable water...

... electrochemically and optically monitored constant load tests were conducted on one CrMn-stainless steel under simulated drilling conditions at elevated temperatures. Electrochemical results confirmed the susceptibility of the investigated grade to pitting corrosion in the test environments. The pitting...

... completion of the tests and analyzed for pitting corrosion. Statistical analysis of the pre- and post-VCI exposed coupons’ corrosion rates were compared to evaluate effectiveness of the VCIs for mitigating corrosion on the weathered coupons. The paper presents experimental data and results...

... days ² . Passing or failing the test is based solely on the observation of crack initiation. Although it is very common for carbon steel coupons to simultaneously experience both cracking and pitting corrosion over the test duration, alternative methods ³ with no applied stress should...

... to failure was observed when testing in CO₂ environment as compared with air. Fe17Cr5.5Ni-based alloys possessed better SCC resistance than Fe13Cr5Ni-based alloys. The increase of Cr and Ni content tended to enhance the resistance to SCC and pitting corrosion. The SCC behaviors of Fe13Cr5Ni...

... Material selection in refinery and chemical industry is often challenging and several aspects needs to be taken into consideration, such as mechanical properties, maximum application temperature, pitting corrosion resistance, acid corrosion resistance, and weldability. Commonly used stainless steels often...

...Vapor Corrosion Inhibitors Aboveground Storage Tank Bottom Plate Pitting Corrosion INTRODUCTION Soil-side corrosion of the bottom plates of aboveground storage tanks is a major concern and maintenance issue in the fossil fuel industry. Literature information ^{1 , 2 , 3} show that soil...

...Abstract During drilling operations the drillstring might be subjected to downhole conditions leading to pitting corrosion. State-of-the-art directional drilling technologies are very demanding in terms of material requirements including corrosion resistance. Manganese-stabilized fully austenitic...

... is the ratio of the average to the minimum cross-sectional area of corroded steel bars is introduced to describe spatial variation of pitting corrosion along the length of steel bars. Probabilistic analysis shows that the pitting index R can be fitted with Gumbel distribution function very well...