On the Microstructure and Erosion Corrosion Behavior of Laser Processed Nickel Aluminium Bronze

2020 ◽  
Vol 979 ◽  
pp. 157-161
Author(s):  
A.K. Lakshminarayanan ◽  
S.R. Koteswara Rao ◽  
K. Sridhar ◽  
A. Vignesh
Keyword(s):  
Corrosion Rate ◽  
Surface Hardness ◽  
Jet Impingement ◽  
Impact Angle ◽  
Fine Grain ◽  
Erosion Corrosion ◽  
Aluminium Bronze ◽  
Grain Formation ◽  
Processed Sample ◽  
Enhanced Surface

Slurry jet impingement test was carried out on a laser processed nickel aluminium bronze (NAB) and the results are compared with the as-cast NAB. It is observed that the invariably, erosion corrosion rate is increasing with the jet velocity. Also, as the slurry impact angle is increased, the erosion corrosion rate of laser processed and as-cast NAB decreased. The erosion corrosion rate of laser processed sample exhibited 28 % higher erosion resistance as compared to the as-cast NAB. Enhanced surface hardness and fine grain formation due to laser processed are the main reasons for the improvement in the erosion corrosion resistance.

Erosion-Corrosion Behavior of Hydraulic Perforating Equipment during Fracturing

2014 ◽  
Vol 700 ◽  
pp. 626-630
Author(s):  
Shi Ming Long ◽  
Wei Wang ◽  
Mian Zhang ◽  
Lu Cui ◽  
Yi Hua Dou
Keyword(s):  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Guar Gum ◽  
Jet Impingement ◽  
Corrosion Damage ◽  
Impact Angle ◽  
Flow Displacement ◽  
Experimental Apparatus ◽  
Erosion Corrosion ◽  
The Impact

Erosion-corrosion behavior in downhole tubulars and oilfield ground gathering transferring system is interesting in optimum design. This work is addressed to investigate erosion-corrosion behavior of hydraulic perforating equipment during fracturing. The typical fracturing fluid of 0.2% hydroxypropyl guar gum solution mixed with quartz grain was selected. The relationship between erosion-corrosion rate and flow displacement, the effect of the flow impact angle on erosion-corrosion rate is performed on a jet impingement experimental apparatus. In the experiment situation, the erosion-corrosion rate reaches highest at the impact angle of 45°. The erosion-corrosion rate increased exponentially with the increase of flow displacement. The surface morphology of specimen suffer from erosion-corrosion is analyzed by scanning electron microscopy (SEM) to characterize the erosion-corrosion damage mechanisms.

A Novel Approach for Metal Surface Modification

2007 ◽  
Vol 280-283 ◽  
pp. 1805-1806
Author(s):  
Zhi Jun Cao ◽  
Jia Chen Liu ◽  
Li Bin Liu ◽  
Hao Ye ◽  
Yan Qiu Wei
Keyword(s):  
Surface Modification ◽  
Wear Rate ◽  
Charge State ◽  
Metal Surface ◽  
Surface Hardness ◽  
Metallic Surface ◽  
New Approach ◽  
Novel Approach ◽  
Complex Shapes ◽  
Enhanced Surface

A new approach was developed for surface modification of metallic surface. By treating nano-zirconia particles and metal surface in different charge state, nano-zirconia particles can be dispersedly inlaid in metal surface owing to electrostatic and nanometer effects. By using this method, metal components of complex shapes, especially those having inside surfaces, might be easily improved, i.e., enhanced surface hardness and wear rate.

Study on the Flow- Induced Corrosion of P110 Oil Tube with an Electrochemical Method

2013 ◽  
Vol 683 ◽  
pp. 396-399
Author(s):  
Zhi Guo Wang ◽  
Zhen Li ◽  
Xiao Yan Liu ◽  
Yi Hua Dou
Keyword(s):  
Corrosion Rate ◽  
Flow Velocity ◽  
Electrochemical Method ◽  
Fluid Velocity ◽  
Impact Angle ◽  
Nacl Solution ◽  
Cathode Reaction ◽  
Flow Induced Corrosion ◽  
P110 Steel ◽  
The Impact

P110 Steel Flow-induced corrosion Electrochemical Method Abstract. Electrochemical measurements have been used to investigate the flow-induced corrosion behaviors of P110 oil tube in 3.5wt% NaCl solution. The corrosion rates were calculated by linear polarization resistance method and weak polarization method respectively. The results demonstrated that corrosion rate of P110 steel increases sharply with the flow velocity increase when the impact angle is 30°, but it reach the first plateau when the fluid velocity changes from 5.6 m/s to 7.8 m/s and the corrosion rate increases sharply again when the velocity beyond 7.8 m/s. After that, corrosion rate decrease when the velocity is more than 10.0m/s. It is demonstrated that the corrosion rate of steel P110 is controlled by cathode reaction of oxygen diffusion in the 3.5 wt % NaCl solution when the flow velocity is over 10.0m/s.

Prognosis the Erosion-Corrosion Rates for Slurry Seawater Flow in Steel Pipeline Using Neural System

2014 ◽  
Vol 1025-1026 ◽  
pp. 355-360 ◽  
Author(s):  
Ahmed El-Shenawy ◽  
Mohamed Shehadeh
Keyword(s):  
Corrosion Rate ◽  
Turbulent Flow ◽  
Reynolds Numbers ◽  
Neural System ◽  
Time Interval ◽  
Steel Pipes ◽  
Erosion Corrosion ◽  
Laminar And Turbulent Flow ◽  
The Neural Networks ◽  
A New Technique

The work of this paper proposes a new technique for estimating and predicting erosion corrosion rate for laminar and turbulent flow in pipes. The technique depends on the neural networks Artificial Intelligent algorithms. Based on experimental results, which was applied to A 106 carbon-steel pipes, the networks are trained. Four velocities (Reynolds numbers) are used for laminar and four for turbulent regimes. The experiments also used seawater containment three different concentrations of sand. For each experiment the iron losses were measured six times in three hours’ time interval. The proposed estimating/predicting system managed to find values between the readings as well as predict the behavior of the erosion corrosion rate for extra three hours. The estimated/predicted results have been developed to find the transient zone between the Laminar and Turbulent flow regimes and investigating its effects on the erosion-corrosion behavior.

New Model to Predict Water Droplets Erosion Based on Erosion Test Curves: Application to On-Line Water Washing of a Compressor

2019 ◽  
Author(s):  
Domenico Borello ◽  
Paolo Venturini ◽  
Serena Gabriele ◽  
Michele Andreoli
Keyword(s):  
Surface Roughness ◽  
Erosion Rate ◽  
Model Development ◽  
Surface Hardness ◽  
Time Frame ◽  
Impact Angle ◽  
New Model ◽  
Water Washing ◽  
Erosion Prediction ◽  
On Line

Abstract Here, a new model for predicting the water droplet erosion (WDE) from online water washing in compressors is developed and its results are discussed in comparisons with a baseline model. The model development started with the analysis of existing WDE models as well as pertinent experimental campaigns aiming at extracting a comprehensive erosion model able to account for the influence of droplet velocity and diameter, impact angle, surface roughness and hardness on the erosion phenomena. The new approach is applied to the study of WDE for droplets of 100 μm diameter in a gas turbine compressor and the predictions are compared with those of the Springer model. Even if the two models (Springer’s and ours) return qualitatively similar results, the erosion prediction is strongly different as in Springer model the erosion rate is four time higher than in the present model. This difference is attributed to the oversimplification of Springer model that does not account for any of the parameters that are relevant for the water erosion such as surface hardness and roughness as well as for a different treatment of the incubation period. Furthermore, to analyze the effect of all the main quantities affecting WDE process, several simulations were performed. Droplets diameter is found to be the key parameter, in determining the erosion rate. Reducing the diameter one can reduce erosion from online water washing. Surface hardness is also very important, while surface roughness can be relevant depending on the time frame one is interested at.

scholarly journals Correction: Li, P., et al. Research on Erosion-Corrosion Rate of 304 Stainless Steel in Acidic Slurry via Experimental Design Method. Materials 2019, 12, 2330

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3181
Author(s):  
Ping Li ◽  
Yanjie Zhao ◽  
Libo Wang
Keyword(s):  
Stainless Steel ◽  
Experimental Design ◽  
Corrosion Rate ◽  
Design Method ◽  
304 Stainless Steel ◽  
Experimental Design Method ◽  
Erosion Corrosion

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