... cost, the application of a protective coating system under the insulation is critical. The new vapor corrosion inhibitor when added to the thermal insulation provided highly effective corrosion resistance. corrosion under insulation corrosion inhibitor pipeline steel localized corrosion INTRODUCTION...

... of a protective coating system under the insulation is critical. The new vapor corrosion inhibitor when added to the thermal insulation provided highly effective corrosion resistance. corrosion under insulation corrosion inhibitor pipeline steel localized corrosion INTRODUCTION Corrosion Under Insulation (CUI...

... pipeline steel polyethylene oil pipelines INTRODUCTION External corrosion, as one of the main causes for pipeline failures ^{1 , 2} , has been investigated extensively and its theoretical mechanisms are well demonstrated and accepted. ³ External corrosion occurs when external coating...

... to H₂S environments with short exposure time were investigated. Corrosion exposure tests and linear polarization resistance (LPR) techniques were performed. The corrosion products of pipeline steel formed under sour corrosion conditions were analyzed by scanning electron microscopy (SEM), and X-ray...

...Pipeline steel enamel coating scanning electron microscopy (SEM) cathodic protection (CP) electrochemical impedance spectroscopy (EIS) INTRODUCTION Abstract Cathodic protection (CP) integrated with a protective barrier (e.g., thick organic coating) has been widely applied for the corrosion...

... distributions over the surface of the bend samples made from a representative mix of both corrosion-resistant alloys (Type 316, 2205, 420, and 440 stainless steels) and pipeline steels (API 5L X65 and X80) and compare the measured peak stress to the pseudo-stress calculated using Method B. The measured average...

... by the composition of the soil electrolyte, ⁵ this composition may also depend on the steel corrosion rate, the vital activity of various bacteria under a delaminated coating, and other factors. ⁶ Abstract It is known that stress corrosion cracking (SCC) of pipeline steels appear...

... on pipeline steel corrosion in various soil environments. A key benefit of the developed model is its rapid scalability, allowing the simulation of these interrelated phenomena for different geometries, dimensions, and boundary/initial conditions. The results of a select number of cases are presented...

...-state element current of 0.55 µA ( Figure 15 ). It has to be noted here that no water is necessary to get high element currents between steel and magnetite This means that a low water content in transmission pipelines is no general guarantee that the pipeline steel is not corroding. Significance...

... the corrosion rate of pipeline steels in subcritical CO₂ stream for accurately analyzing the experimental data and assessing corrosion kinetics of steels in supercritical CO₂ stream. The methodology and apparatus described in ASTM ⁽²⁾ G202-09 ²⁶ were adapted...

...Abstract Hydrogen permeation behavior of pipeline steel under different sour condensate film condition was investigated by in-situ testing. The effects of H₂S corrosion product scales and the temperature of wet gas containing a high content of hydrogen sulfide on the hydrogen permeation...

... CR_2nd =Δm_2nd / (S×t_2nd) η_2nd = (CR_2nd^blank - CR_2nd^Inhibitor) / CR_2nd^blank ×100% pre-corrosion corrosion inhibitor carbon dioxide inhibitor evaluation pipeline steel INTRODUCTION CO₂...

...Group 1: pipeline steel — magnesium sacrificial anode; Group 2: pipeline steel — zinc sacrificial anode; Group 3: pipeline steel — Cu-grounding. The adopted AC current density ranged from 0, 50 A·m⁻², 100 A·m⁻², 200 A·m⁻² to 300 A·m⁻² and was sine...

...Abstract The effect of plastic deformation was investigated on hydrogen permeation of cold rolled or tensile specimen of X65 pipeline steel. The diffusion coefficient of hydrogen was measured using three techniques: Subsequent Transients, Partial Transients and Desorption Technique. Cold work...

...sand deposits corrosion inhibitor under-deposit corrosion pipeline steel localized corrosion INTRODUCTION As a severe corrosion problem for the oil and gas industry, under-deposit corrosion causes localized corrosion such as crevice corrosion and pitting. The main control measures used...

...Abstract Prior research has confirmed the occurrence of SCC of X60 and X65 pipeline steels in simulated fuel grade ethanol (SFGE) environments, and has shown that this SCC is exacerbated by the presence of chloride ions, dissolved oxygen, and organic acids. These constituents also contribute...

...Abstract A phenomenological model is developed for environmentally assisted cracking of pipeline steels in the near-neutral pH soil environments, based on the hypothesis that the cracking is dominated by the corrosion fatigue mechanism promoted by hydrogen embrittlement. The comparison...

...Scratch tests Abstract Growing interest in the use of alternative fuels has led to an increase in production of fuel grade ethanol (FGE), necessitating an efficient method of transportation for this biofuel. Occurrences of stress corrosion cracking (SCC) of pipeline steels in FGE have spurred...

... of steel active dissolution ² . This type of SCC is typical of high pressure buried pipelines in Russia ³ . Abstract The electrolyte composition was shown to affect the crack growth rate in pipeline steel X70. Citrate buffer (pH 5.5) and a mixture of NS4 solution with borate buffer...

... in the solution and the solution flow velocity favors the growth of corrosion pits. Internal pitting corrosion pipeline steel sands micro-electrochemical measurements INTRODUCTION Corrosion of steels in CO₂-containing environments has been one of the primary mechanisms resulting in structural...