Salt Spray Performance Evaluation: Proposed Image-Analysis-Based Test Method

2008 ◽  
pp. 3-3-12
Author(s):  
YJ Warburton ◽  
DL Gibbon
Keyword(s):  
Image Analysis ◽  
Performance Evaluation ◽  
Salt Spray ◽  
Test Method

ANTICORROSION PERFORMANCE OF SELF-HEALING POLYMERIC COATINGS ON LOW CARBON STEEL SUBSTRATES

2017 ◽  
Vol 79 (7-4) ◽  
Author(s):  
Muhammad Ashraff Ahmad Seri ◽  
Esah Hamzah ◽  
Abdelsalam Ahdash ◽  
Mohd Fauzi Mamat
Keyword(s):  
Steel Substrate ◽  
Salt Spray ◽  
Immersion Test ◽  
Salt Spray Test ◽  
Test Method ◽  
The Self ◽  
Self Healing ◽  
Pure Epoxy ◽  
Steel Substrates ◽  
Epoxy Paint

Recently, self-healing coating is classified as one of the smart coatings which has the ability to heal or repair damage of the coating to prevent further corrosion. The aim of this study is to synthesize the self-healing coatings from polymeric material and evaluate the performance and their corrosion behavior when coated on steel substrates. The corrosion tests were performed using immersion test and salt spray test method at room temperature. The immersion test shows that self-healing coating gives lower corrosion rate compared to pure epoxy paint, with a value of 0.02 and 0.05 mm/year respectively. Also, salt spray test shows similar trend as the immersion test, which is 0.11 and 0.19 mm/year for self-healing coating and pure epoxy paint respectively. While uncoated samples without any protection corroded at 0.89 mm/year. It was also found that the damage on self-healing coating was covered with zeolite from the microcapsules indicating that the self-healing agent was successfully synthesized and could function well. In other words, self-healing coating shows better corrosion resistance compared to the pure epoxy coating on steel substrate.

The study of the effectiveness of corrosion protection of zinc-rich coating on the base of water sodium silicate

2020 ◽  
Vol 25 (4) ◽  
Keyword(s):  
Corrosion Protection ◽  
Sodium Silicate ◽  
Electrochemical Impedance ◽  
Paint Film ◽  
Salt Spray ◽  
Salt Spray Test ◽  
Test Method ◽  
Liquid Sodium ◽  
Research Station ◽  
Marine Research

The study is examines the assessment of the corrosion-protective properties of zinc-rich coating based on water sodium silicate (ZRC) using the Electrochemical Impedance Spectra (EIS) with AutoLAB PGSTAT204N. The system consists of three electrodes: Ag/AgCl reference electrode in 3 M solution of KCl, auxiliary electrode – Pt (8x8 mm) and working electrodes for determination potential (Ecorr) and impedance measurement, salt spray test method and natural teszzt method at Dam Bay Marine Research Station, Nha Trang, Khanh Hoa, Viet Nam. ZSC can provide good cathodic protection when zinc content is 70% by weight or more. ZSC with a mixing ratio of High Modulus Liquid Sodium Glass / Zinc Powde : 25/75 by weight (working title – TTL-VN) has good corrosion protection after 16 cycles salt spray test and after 18 months natural test in seawater. The paint film has basic parameters as adhesion – 4,41 MPa, flexural strength – 2 mm, pendulum hardness – 0,62 conventional units and initial coating potentia l – 0,96 V Ag/AgCl.

Corrosion Behaviour of Steel Nitrided and Nitrocarburized in Gas, Respectively

2015 ◽  
Vol 365 ◽  
pp. 278-284
Author(s):  
Hisao Fujikawa ◽  
H. Iwamura ◽  
M. Uramoto
Keyword(s):  
Corrosion Test ◽  
Corrosion Behaviour ◽  
Plasma Nitriding ◽  
Salt Spray ◽  
Salt Bath ◽  
Carbon Steels ◽  
Test Method ◽  
Oxidation Treatment ◽  
Gas Nitriding ◽  
Nitride Layers

Nitriding treatment is well known as one of the corrosion protection methods for steels as well as a way to prevent wear and fatigue. Initially, salt bath nitrocarburizing was popular, but recently, gas nitriding, gas nitrocarburizing, plasma nitriding and so on have come to be used more often because of their superior nitriding ability. In the case of nitriding, only nitrogen (N) diffuses into the steel, but in the case of nitrocarburizing, both nitrogen and carbon (C) diffuse into the steel. General speaking, nitriding includes all the treatments mentioned above. The corrosion behavior of nitride carbon steels has been understood mainly by salt bath or gas nitrocarburizing treatments1)-4).However, recently, nitriding is mainly applied to parts for things such as automobiles which need protection from wear and fatigue, and is seldom used for parts which need corrosion resistance. The present paper is to remind researchers again that nitrided steels show good corrosion resistance.Therefore, the comparison of various thicknesses of nitride layers as well as the comparison between nitride layers on steel has been carried out in this examination, using the salt spray corrosion test method. The effect of oxidation treatment after nitriding was also investigated.

A Framewrok of Prototype Compressor Impeller Auto-Test System

2013 ◽  
Vol 457-458 ◽  
pp. 667-671
Author(s):  
Ji Kai Ma ◽  
Zhi Feng Liu
Keyword(s):  
Performance Evaluation ◽  
Performance Test ◽  
Work Conditions ◽  
Test System ◽  
Test Method ◽  
Compressor Impeller ◽  
Manual Test ◽  
Status Data

This paper presents a framework of prototype compressor impeller auto-test system. Two type performance test can be held in a unique pipeline layout. Work conditions are accuratly under control. Status data is acquired synchronously and precisely. Performance evaluation is accomplished efficient. This framework is proved to be highly available to improve traditional manual test method.

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