scholarly journals SLURRY EROSION-CORROSION RESISTANCE OF ELECTROLESS Ni-P PLATING ON AISI 5117 STEEL

2013 ◽  
Vol 41 (4) ◽  
pp. 1467-1479
Author(s):  
B. Yosseif Mohamed Saleh
Keyword(s):  
Corrosion Resistance ◽  
Slurry Erosion ◽  
Erosion Corrosion ◽  
Electroless Ni

scholarly journals Effects of Surface Morphology on Erosion–Corrosion and Corrosion Resistance of Highly Hydrophobic Nickel-Tungsten Electrodeposited Film

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1084
Author(s):  
Parinaz Salehikahrizsangi ◽  
Keyvan Raeissi ◽  
Fathallah Karimzadeh ◽  
Luigi Calabrese ◽  
Edoardo Proverbio
Keyword(s):  
Corrosion Resistance ◽  
High Speed ◽  
Sessile Drop ◽  
Electrochemical Impedance ◽  
Initial Contact ◽  
Slurry Erosion ◽  
Corrosion Properties ◽  
Electrodeposited Film ◽  
Erosion Corrosion ◽  
Static Immersion

Hard nanocrystalline Ni-Co or Ni-W coatings are receiving a growing interest owing to their premium hardness, wear, and corrosion properties for several industrial applications. Furthermore, surface hydrophobicity greatly improves surface corrosion resistance. In this research, the durability of hydrophobic hierarchical NiW electrodeposited film has been evaluated in a high-speed slurry erosion–corrosion (EC) test rig. Two different coatings have been tested: a rough coating obtained in a chloride-based bath (NiWchloride) and a smooth coating obtained in a sulfate-based bath (NiWsulfate). Corrosion behavior over time was evaluated by electrochemical impedance spectroscopy (EIS), while surface hydrophobic performance was determined by the sessile drop method. The morphological features of the coatings were assessed by scanning electron microscopy while roughness modification during the EC tests were identified by means of an atomic force microscopy. During static immersion in the aggressive solution, the impedance modulus of the coatings continuously increased due to an increase in the thickness of corrosion products. During the EC test, the impedance modulus of the smooth NiW coating decreased, losing its barrier property. It was observed that the increase in impedance modulus of the hierarchical structure of the rough NiW coating during EC was far greater than that during static immersion. After 64 min of EC, the NiWchloride was able to resume its hydrophobicity property by storing in air; nevertheless, the NiWsulfate, with a loss of approximately 72% in its initial contact angle, was no longer hydrophobic. The results showed improvements in the lifetime of hydrophobic NiW coatings in erosion–corrosion conditions of the hierarchical nanostructure obtained in a chloride-based electroplating bath.

Slurry Erosion–Corrosion Resistance of MoNbTaTiZr High Entropy Alloy

2021 ◽  
Vol 7 (3) ◽  
Author(s):  
A. K. Sharma ◽  
G. Perumal ◽  
H. S. Arora ◽  
H. S. Grewal
Keyword(s):  
Corrosion Resistance ◽  
High Entropy Alloy ◽  
Slurry Erosion ◽  
High Entropy ◽  
Erosion Corrosion

scholarly journals Improvement of Erosion-Corrosion Behavior of AISI 420 Stainless Steel by Ion-Assisted Deposition ZrN Coatings

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1811
Author(s):  
Yuntao Xi ◽  
Lin Wan ◽  
Jungang Hou ◽  
Zhiyong Wang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Small Angle ◽  
Martensitic Stainless Steel ◽  
Multilayer Coating ◽  
Knoop Hardness ◽  
Slurry Erosion ◽  
Aisi 420 ◽  
Erosion Corrosion

In this paper, a pragmatic technique has been developed to evaluate the erosion-corrosion behavior of three kinds of ZrN coatings (i.e., monolayer, multilayer, and gradient layers) which were deposited on AISI 420 martensitic stainless steel using an ion-assisted deposition technology. Among them, the monolayer coating refers to the coating with no change in composition and structure, the multilayer coating refers to the coating with alternating change of Zr/ZrN, and the gradient coating refers to the ZrN coating by increasing N2 partial pressure gradually. The morphology, composition, and microhardness of these ZrN coatings were examined by means of integrating the scanning electron microscopy (SEM), X-ray diffraction (XRD), and Knoop hardness measurements, while anodic polarization tests and salt fog spray tests in a simulated industrial environment have been performed to evaluate and identify the corrosion mechanisms of these coatings. The surface microhardness and corrosion resistance of the AISI420 martensitic stainless steel is found to be significantly improved by depositing the ion-assisted deposition ZrN coatings. The study indicates that the erosion-corrosion behavior in the slurry is the result of the synergistic effect of small-angle erosion and acid solution corrosion. Three ZrN coatings hinder the slurry erosion-corrosion behavior from two aspects (i.e., erosion resistance of small-angle particles as well as corrosion resistance of the substrate), thereby significantly improving the erosion-corrosion resistance of AISI 420 stainless steel. In addition, the ZrN gradient coatings show a much better erosion-corrosion resistance than that of the monolayer/multilayer ZrN coating because they have excellent crack resistance, bearing capacity, and electrochemical performance.

EMPIRE ISO-40

Alloy Digest ◽  
1972 ◽  
Vol 21 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Stress Corrosion Cracking ◽  
Heat Treating ◽  
Temperature Performance ◽  
Erosion Corrosion ◽  
Steel Castings

Abstract EMPIRE IS0-40 is a precipitation-hardenable stainless steel for castings resistant to corrosion, stress-corrosion cracking and erosion-corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-278. Producer or source: Empire Steel Castings Inc..

Impact of Barium in Improving Corrosion Resistance and Properties of Electroless Ni–Ba–B Alloy Deposits

2019 ◽  
Vol 26 (7) ◽  
pp. 979-988 ◽  
Author(s):  
Sareh Rahmani ◽  
Abdollah Omrani ◽  
Sayed Reza Hosseini
Keyword(s):  
Corrosion Resistance ◽  
Electroless Ni

A Preliminary Study of Anodization and Electroless Ni–P Plating on AZ80 Magnesium Alloy

2011 ◽  
Vol 299-300 ◽  
pp. 663-666 ◽  
Author(s):  
Ping Shi ◽  
Xue Dong Han
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Weight Ratio ◽  
High Strength ◽  
Surface Modifications ◽  
Atomic Ratio ◽  
Az80 Magnesium Alloy ◽  
Micro Arc Oxidation ◽  
Preliminary Study ◽  
Electroless Ni

Magnesium alloys are being used as structural components in industry because of their high strength to weight ratio. But their high electrochemical activity and poor corrosion resistance limited their applications. Therefore, surface modifications are needed for protection purpose. This paper studied the anodic micro-arc oxidation and electroless Ni-P plating surface modifications on AZ80 magnesium alloy. The SEM, XRD and EDS were used to characterize the surface coating. It shows that a micro-porous MgO layer with the pores size 5 – 20 μm was fabricated on the bare magnesium alloy. The nodule Ni-P deposition could be prepared on the out layer of MgO with Ni/P atomic ratio being 1.4. The pores in MgO layer could be sealed by the following Ni-P deposition. Therefore the corrosion resistance of the magnesium alloy could be further improved.

Sign in / Sign up

Export Citation Format

Share Document