Effects of laser surface melting on erosion–corrosion of X65 steel in liquid–solid jet impingement conditions

Abstract

Laser Surface Melting (LSM) has the potential to increase the resistance of steels to erosion-corrosion. In this study a submerged jet impingement system containing a brine under saturated CO2 conditions with sand has been used to assess the effect of LSM on the erosion-corrosion resistance of X65 steel. Erosion-corrosion rates under different experimental conditions were deduced based on CFD-simulated results and surface profile measurements. Scanning Electron Microscopy (SEM) was used to observe the morphology of erosion-corrosion damage. The results show that the erosion-corrosion rates at various impact angles can be decreased by LSM. Changes in microstructure, corrosion behaviour and hardness of X65 steel induced by laser treatment were analyzed by using optical microscopy, Transmission Electron Microscopy (TEM), Energy Dispersive X Ray analysis (EDX) together with electrochemical polarization and hardness distribution measurements, in order to clarify how laser treatment imparts the effects on the steel.

Pretreatment of CFRP by Amino Thermoset Abrasive Air Jet Machining

“…This view is fully proved by Zhao et al [28] . The particle erosion mechanism of CFRP is shown in Figure 4.…”

An Overview of Major Experimental Methods and Apparatus for Measuring and Investigating Erosion-Corrosion of Ferrous-Based Steels

“…A jet rig system can be employed for both pure erosion under dry sand impingement using an air compressor [57][58][59] and erosion-corrosion under a slurry impingement using a fluid pump [13,[60][61][62][63][64][65][66][67][68]. This section only focuses on the slurry jet impingement systems which are used in the study of erosion-corrosion.…”

“…Consequently, when studying the general performance of the erosion-corrosion under different sand impact angles, it is better to machine the sample smaller than the area of the nozzle to maintain a small deviation of the impact angle on the target surface. However, a sample with a larger diameter of the nozzle can be used to study the local erosion-corrosion behavior at different fluid flow regimes as shown in Figure 5 [61]. Likewise, a series of small samples can be placed at different regions below the slurry jet rig to study the influence of the hydrodynamic parameters on the erosion-corrosion [62,70].…”

“…Figure 5. The photo of a steel sample with observed different wear morphologies at three regions in combination with the CFD predictions of particle motion [61], adapted from [61], with permission from Elsevier, 2016. [59], adapted from [59], with permission from Elsevier, 2015.…”

Towards optimum additive performance: A numerical study to understand the influence of roughness parameters on the zinc dialkyldithiophosphates tribofilm growth

“…The surface roughness can improve the friction and wear performance by enabling accumulation of lubricant within the micro-features to provide a secondary supply of lubricant, 28,29 trapping abrasive worn particles to reduce abrasive wear, [30][31][32] and improving the hydrodynamic pressure build up to enhance lubrication. 33,34 Roughness has also been found to affect the transition of lubrication regimes and in some cases the micro-features on the rough surfaces postpone the transition to boundary lubrication. 35 Tomanik et al 36 suggested that the hydrodynamic load support increased by almost 50% to 90% when laser surface texturing was employed.…”