Using polarization curve research shielded wire corrosion status of neutral salt spray test

2013 ◽  
pp. 137-140
Keyword(s):  
Polarization Curve ◽  
Salt Spray ◽  
Salt Spray Test ◽  
Neutral Salt

Research on the Performance of Shielded Wire Passivated by 823 Preservatives in Neutral Salt Spray Test

2014 ◽  
Vol 556-562 ◽  
pp. 3-5
Author(s):  
Ke Shun Dai ◽  
Wen Kai Xiao ◽  
Tan Yu
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Polarization Curve ◽  
Salt Spray ◽  
Corrosion Cracking ◽  
Salt Spray Test ◽  
Normal Operation ◽  
Neutral Salt

The corrosion cracking of Shielded wire could result in protection equipments and automatic devices failing to work, which seriously affects the normal operation of the grid [1]. Therefore, researching the corrosion of Shielded wire has an important meaning. This article, through measurements of the polarization curve of the shield, researched the corrosion rate of different spray time and treatments, and came to a conclusion that the corrosion resistance after passivated by 823 preservatives is higher than before it.

scholarly journals Corrosion behavior of Al film on uranium in salt spray test

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 14981-14988
Author(s):  
Yanping Wu ◽  
Shengfa Zhu ◽  
Peng Shi ◽  
Biaojie Yan ◽  
Dingzhou Cai ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Salt Spray ◽  
Salt Spray Test ◽  
Neutral Salt

The corrosion behavior of Al film coated uranium and bare uranium under neutral salt spray conditions are evaluated.

scholarly journals Ultrasonic Sensors-Assisted Corrosion Studies on Surface Coated AlSi9Cu3 Alloy Die Castings

Coatings ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 85
Author(s):  
Yuh-Chung Hu ◽  
Senthil Kumaran Selvaraj ◽  
Manivannan Subramanian ◽  
Kathiravan Srinivasan ◽  
Srinivasan Narayanan
Keyword(s):  
Corrosion Resistance ◽  
Die Casting ◽  
Pure Aluminum ◽  
Salt Spray ◽  
Salt Spray Test ◽  
Al Alloy ◽  
Neutral Salt ◽  
Powder Coatings ◽  
Acrylic Paint ◽  
Epoxy Primer

A novel phenomenon known as Industry X.0 is becoming extremely popular for digitizing and reinventing business organizations through the adaption of rapid and dynamic technological, innovational, and organizational changes for attaining the profitable revenue. This work investigates the die-casted commercially pure aluminum alloyed with 9% silicon and 3% copper (AlSi9Cu3) that is produced through the gravity die casting process. Further, the degradation of surface coating on die-casted AlSi9Cu3 alloy was explored. The acrylic paint electrodeposition (ED) coat, 2-coat polyester without primer and 3-coat polyester with epoxy primer powder coatings were used in this study. Moreover, the 3.5 wt.% of sodium chloride (3.5 wt.% of NaCl) test solution was used for electrochemical and salt spray test and the tools used to assess electrochemical properties were electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and neutral salt spray test (NSS). The microstructure of AlSi9Cu3 after corrosion exposure was investigated; also, the microstructure of coated and uncoated AlSi9Cu3 samples was analyzed by SEM microscopy after corrosion exposure. Besides, the electrochemical studies were also carried out on the Al alloy die casting. It was found that acrylic paint ED coatings exhibited higher corrosion resistance than 2-coat polyester without primer & 3-coat polyester with epoxy primer powder coatings. Acrylic paint ED coating showed higher corrosion resistance in AC and a lower value in DC and 3-coat polyester with epoxy primer powder coating displayed higher corrosion resistance in DC and a lower value in AC.

A New Chromate-Free Insulating Coating on Silicon Steel

2014 ◽  
Vol 1004-1005 ◽  
pp. 757-762 ◽  
Author(s):  
Shuang Hong Wang ◽  
Yong Feng Long ◽  
Shi Lu Zhao ◽  
Cheng Qiang An ◽  
Ke Ding
Keyword(s):  
High Temperature ◽  
Salt Spray ◽  
Silicon Steel ◽  
Salt Spray Test ◽  
Neutral Salt ◽  
Test Results ◽  
High Temperature Annealing ◽  
Electrochemical Test ◽  
Comprehensive Performance ◽  
Resistance Value

The water-based paint had been examined to prepare a new chromate-free insulating coating on silicon steels. The structure of the insulating coating was characterized by scanning electron microscopy, energy dispersive spectroscopy and infrared spectroscopy. Adhesion, high temperature annealing, and surface insulating resistance were measured. Corrosion resistance was investigated by neutral salt spray test and electrochemical test. Results exhibited that the insulating coating had excellent comprehensive performance. The adhesive level was 5B degree; the high temperature annealing test showed no coating degradation after heat treatment of 2 h at 450 °C in air or at 750 °C in nitrogen; the salt spray test showed the corrosion area was less than 2 % after the 12 h salt spray; when the coating thickness was 1.0-1.2 μm, the surface insulating resistance value was 380-420 Ω/mm2.

scholarly journals Study on the Corrosion Mechanism of Zn-5Al-0.5Mg-0.08Si Coating

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Shiwei Li ◽  
Bo Gao ◽  
Ganfeng Tu ◽  
Yi Hao ◽  
Liang Hu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Salt Spray ◽  
Microstructural Characterization ◽  
Alloy Coating ◽  
Salt Spray Test ◽  
Corrosion Mechanism ◽  
Neutral Salt ◽  
Test Results ◽  
Coating Surface ◽  
New Type

A new type of hot-dip Zn-5Al-0.5Mg-0.08Si and Zn-5Al alloy coatings was performed on the cold rolled common steel. The hot-dip process was executed by self-made hot-dip galvanising simulator. SEM and EDS test results demonstrated that Mg was mainly distributed in crystal boundaries. XRD test results showed that the corrosion product of Zn-5Al-0.5Mg-0.08Si alloy coating was almost Zn5(OH)8C12⋅H2O. The features of Zn5(OH)8C12⋅H2O are low electric conductivity, insolubility and good adhesion.The corrosion resistance of alloy-coated steels was detected by neutral salt spray test. The microstructural characterization of the coating surface after neutral salt spray test and removing the corrosion products revealed that the corrosion process of Zn-5Al-0.5Mg-0.08Si coating was uniform and the coating surface was almost flat. As a result, the corrosion resistance of Zn-5Al-0.5Mg-0.08Si coating has a remarkable improvement with a factor of 9.2 compared with that of Zn-5Al coating.

scholarly journals Effect of Magnesium on Corrosion Resistance of Galvalume Coating

2021 ◽  
Vol 2101 (1) ◽  
pp. 012078
Author(s):  
Z L Ding ◽  
J Zhang ◽  
S M Jiang ◽  
Q F Zhang
Keyword(s):  
Corrosion Resistance ◽  
Polarization Curve ◽  
Salt Spray ◽  
Salt Spray Test ◽  
Surface Corrosion

Abstract In order to improve the performance of Galvalume coating, the expected microstructure and the better property could be obtained by adding 1∼3% Magnesium into Galvalume coating (55%Al-Zn). In this paper, effect of magnesium on the corrosion resistance of 55%Al-Zn coating was studied. The morphology and microstructure of coatings, polarization curve and surface corrosion of two different kinds of samples were analysed by SEM, EDS, electrochemistry workstation and salt spray test. The results show that the numbers of surface spangles by adding 2% magnesium are not changed obviously; the corrosion resistance of 55% Al-Zn-2%Mg coating becomes much better.

scholarly journals Influence of the adhesive type and metal substrate on adhesion of bonded joints after salt spray test

2018 ◽  
Vol 62 (2) ◽  
pp. 54-64 ◽  
Author(s):  
Klara Machalická ◽  
P. Pokorný ◽  
M. Vokáč
Keyword(s):  
Substrate Surface ◽  
Salt Spray ◽  
Substrate Material ◽  
Lap Joints ◽  
Salt Spray Test ◽  
Experimental Program ◽  
Neutral Salt ◽  
Bonded Joints ◽  
Substrate Surface Roughness ◽  
Influence Of Substrate

Abstract This article was focused on the evaluation of neutral salt spray test effect (according to ISO 9124), procedure E4, on mechanical properties of load-bearing adhesive joints. The study also comprises the influence of substrate material (mild steel, aluminum alloys) and substrate surface roughness (verified by optical confocal microscopy). The experimental program contained acrylate-based adhesive and hybrid silicone polyurethane based adhesive which were applied in double lap joints loaded by shear.

Research on Water Based Coating for Magnesium Alloy

2006 ◽  
Vol 15-17 ◽  
pp. 485-490
Author(s):  
Wei Huang ◽  
Di Li ◽  
Tian Liang Zheng
Keyword(s):  
Heat Resistance ◽  
Salt Spray ◽  
Polymer Network ◽  
Chemical Properties ◽  
Hardness Test ◽  
Salt Spray Test ◽  
Interpenetrating Polymer Network ◽  
Neutral Salt ◽  
Sodium Polyphosphate ◽  
Water Based

Magnesium and its alloys have many applications for theirs excellent physical and mechanical properties. Due to magnesium’s active chemical properties and difficulties in direct painting, a novel environmental protective water based coating was developed, which mainly contains metal flake, silicate, silane and sodium polyphosphate etc. The properties and structure of the coating were investigated by adhesion test, hardness test, heat resistance test, neutral salt spray test and Scanning Electron Microscopy (SEM) et al. Meanwhile, the effect of sodium polyphosphate was also examined by hydrogen evolution test and electrochemical test. Furthermore, the film forming mechanism of the coating was explored by Fourier Transform Infrared spectroscopy (FTIR). Results showed that the coating had a stepped structure which could achieve extraordinary adhesion, 350°C temperature heat resistance, HV0.50/30 210 hardness and 300 hours anti-corrosion time in salt spray test. In the coating, the addition of sodium polyphosphate could greatly improve the corrosion resistance of the coating because of the barrier film formed by sodium polyphosphate. The mechanism of interpenetrating polymer network (IPN) was preliminary put forward based on the results of FTIR.

Optical and Corrosion Studies of Spray Pyrolysis Coated Titanium Dioxide Thin Films

2018 ◽  
Vol 24 (8) ◽  
pp. 5836-5842 ◽  
Author(s):  
V. P. Muhamed Shajudheen ◽  
K. Anitha Rani ◽  
V. Senthil Kumar ◽  
A. Uma Maheswari ◽  
M Sivakumar ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Titanium Dioxide ◽  
Spray Pyrolysis ◽  
Salt Spray ◽  
Salt Spray Test ◽  
Neutral Salt ◽  
X Rays

In the present work, nanostructured thin films of titanium dioxide (TiO2) have been coated on the stainless steel (SS 304L) substrate by spray pyrolysis coating technique. The surface morphology and chemical constituents of the thin film have recorded using Field Effect Scanning Electron Microscopy (FESEM) and Energy Dispersive Analysis of X-rays (EDAX) respectively. The structural and optical properties of the films of as deposited were examined by Micro Raman, Photoluminescence Spectroscopy (PL) and UV-Vis absorption method. The FESEM micrograph showed the microporous nature of the film. EDAX spectrum illustrated the presence of Ti and O on the coated surface of the steel substrate. The peaks in the micro Raman spectrum indicated that the TiO2 samples of present study are in rutile phase of titanium dioxide. A strong emission peak around 350 nm was observed in the Photoluminescence spectrum of the samples. The anti-corrosion properties of the TiO2 coated samples were investigated by neutral salt spray test for 390 h. Electrochemical Impedance Spectroscopy (EIS) analysis and Tafel analysis were performed before and after salt spray test and the results suggested an increase of corrosion resistance of the titanium dioxide thin film in a corrosive environment. The positive shift of equilibrium corrosion potential (Ecorr) of bare stainless steel to thin film coated stainless steel (from −0.96 V to −0.38 V) in the electrochemical Tafel analysis implied the significant increase of corrosion resistance.

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