A surface hardening technique called “interstitial hardening” has been developed to introduce interstitial carbon atoms into stainless steel surfaces without the formation of carbides. Surface hardening of machine elements such as impellors or fasteners would improve performance regarding cavitation and galling resistance, and has intensified interest in this process. The interstitial hardening...

In this paper, electrochemical corrosion tests and full immersion experiments were conducted in seawater at room temperature to investigate the behavior mechanism of high-strength EH47. The polarization curve, EIS (electrochemical impedance spectroscopy), SEM (scanning electron microscope), EDS analyses employed analyze results process. showed that open circuit potential EH47 decreases then inc...

In this study, the oil recovery potential of Smart Water in the Danish sector of the North Sea chalk reservoirs was investigated. A series of flooding experiments were conducted at reservoir conditions, and a spontaneous imbibition test was carried out at reservoir temperature. Reservoir cores were used along with crude oil samples from the North Sea and representative synthetic formation water...

The corrosion behaviors of different weld heat-affected zones (HAZs) were investigated, comprising an API 5L X65 steel immersed in seawater with abundant native microbial community. Before tests, HAZ physical simulations performed at the peak temperatures 700 °C, 860 1000 and 1350 °C. Throughout 14 days immersion, various planktonic bacterial groups associated microbiologically influenced metab...

Using a three-phase batch reactor with coated steel panels, this investigation studies the influence of carbon dioxide (CO2), present in gas phase at conditions high pressure and temperature (HPHT), on degradation an amine-cured epoxy novolac (EN) coating. The combined effect gas, hydrocarbon, seawater compromises coating leads to underfilm corrosion. Consequently, understanding role each phase...

Corrosion behavior of epoxy-coated rebar with different size microdefects in uncarbonated/carbonated simulated pore solution (U/CSPS) seawater concrete was investigated. Specimens both solutions underwent two stages corrosion, according to the electrochemical impedance spectroscopy (EIS) response. The initial stage extension corrosion. second dominated by diffusion process, due corrosion produc...

The synergistic effect of simultaneous mechanical wear, chemical/electrochemical corrosion (tribocorrosion) and microbial attack poses a serious threat to marine coastal infrastructure. To address this important problem, we have developed composite coatings consisting TaC (25–35 at.%) corrosion-resistant α-Fe(Cr,Ni,Mo)-based metal matrix, as well bactericidal elements (Cu, Ag). Coatings 50–75 μ...

Carbon steel is one of the most important and widely used structural materials, but preventing its corrosion remains a great challenge. Herein, metal–organic framework film consisting Zif-8 nanosheets array was prepared using one-step in situ growth method. This coating can effectively inhibit behavior low carbon seawater, resulting improved resistance (4010 ?·cm?2) current density (23 ?A·cm?2)...

Cupronickel 90/10 alloy has been used world wide as a standard material in heat recovery tubes. The alloy exhibits excellent service characteristics and can also withstand flow up to 3.3 m / sec of seawater. This alloy (Cupronickel, 90/10) was used in the construction of Jeddah IV heat recovery section of desal condenser tubes. Jeddah IV desal unit has 4 modules, each module consists of 21 stag...