high corrosion
Recently Published Documents


TOTAL DOCUMENTS

336
(FIVE YEARS 81)

H-INDEX

28
(FIVE YEARS 5)

Author(s):  
Chao Liu ◽  
Qinglin Li ◽  
Tianyi Zhang ◽  
Xiaoming Ding ◽  
Xiaorong Li ◽  
...  

Abstract The pitting corrosion behavior of ZL101A aluminum alloy in simulated marine environment was investigated for guiding the composition design. The Volta potential of the precipitated phases was mainly characterized via the in-situ SKPFM technique. The obtained results indicated that the precipitated phases of ZL101A were composed of Al-Si phase, Si-Mg-Fe phase and Si-rich/Al-poor phase, accelerating the formation of corrosion pits during immersion test. Both Al-Si phase and Si-Mg-Fe phase accelerated the corrosion process through the self-dissolution and the galvanic effect, respectively, which can be contributed to the high corrosion sensitivity of the two phases. Si-rich/Al-poor phase presented high corrosion resistance, which should be related to the deficiency of impure elements such as Mg and Fe.


Author(s):  
Da Bian ◽  
Shanhua Qian ◽  
Zifeng Ni ◽  
Yongwu Zhao

Abstract To further enhance the corrosion resistance of chemically bonded phosphate ceramic coating, TiO2 was grafted on the surface of GO to enhance the interfacial adhesion between GO and the coating. SEM results show that the presence of TiO2 on GO creates a good interfacial adhesion between GO and the coating. In addition, EIS experiments were carried out to investigate the performance of the coatings on the corrosion resistance. The result indicates that the corrosion resistance is enhanced with the introduction of GO-TiO2 hybrid material. Besides the influence of GO on the corrosion resistance, the good interfacial adhesion between GO and the coating with the presence of TiO2 hybrid material can consume more fracture energy to stop crack propagation, which leads to the high corrosion resistance.


2021 ◽  
Vol 19 (11) ◽  
pp. 158-160
Author(s):  
Eman Hammod Abdullah ◽  
Ahmed Hashim ◽  
Huda Abdul Jalil Hussien ◽  
Majeed Ali Habeeb

Films of biopolymer (PVA) doped with titanium nanoparticles (Ti NPs) have been prepared with several ratios of PVA and Ti NPs to apply for gamma ray shielding with low unit cost, flexible, lightweight, and high corrosion resistance. The prepared nanocomposites tested for gamma ray shielding. The experimental results showed the PVA/ Ti nanocomposites films have high coefficients of attenuation for gamma ray.


2021 ◽  
Vol 192 ◽  
pp. 109829
Author(s):  
Gi-Dong Park ◽  
Ji Hoon Yang ◽  
Kyung-Hwang Lee ◽  
Hyo-Jin Kim ◽  
Seung-Hyo Lee ◽  
...  

Author(s):  
V.I. BOLSHAKOV ◽  
Т. О. DERHACH ◽  
D.A. SUKHOMLYN

Formulation of the problem. Corrosion of pipes used in the oil and gas industry leads to significant economic losses, therefore, increasing their corrosion resistance and durability is an urgent task. Purpose: generalization of results of developments of technologies of manufacturing and research of qualitative characteristics of oil and gas pipelines (smooth) and pump-compressor (threaded) pipes of the increased and high corrosion resistance and giving recommendations on their application in oil and gas industry in environments of various corrosion aggressiveness. Methodology. The microstructure of tubular steels and protective coatings was studied by light metallography and electron microscopy. Complex corrosion studies included laboratory tests of samples in model chloride and hydrogen sulfide-containing media, the resistance to sulfide corrosion cracking under stress (SCCS) and hydrogen cracking (НС) according to the methods of NACE TM 0177 and NACE TM 0284 as well as operational tests at the oil fields of Ukraine. Mechanical properties for stretching and impact bending of samples by standard methods. Results. The results of the development of production technologies and the study of the qualitative characteristics of oil and gas pipelines and tubing with increased and high corrosion resistance in aggressive oil and gas production environments are summarized. The influence of the chemical composition of steels and protective coatings, as well as pipe manufacturing technologies on their microstructure, corrosion resistance in various media, and mechanical properties is shown. Scientific novelty. For the first time, the presence of special low-energy boundaries in the ferrite of low-alloy ferrite-pearlite and high-alloy ferritic-austenitic steels was established, their number and energy level were estimated. The high operational reliability of threaded pipes with a protective coating is substantiated. Practical value. The results of the work and recommendations for the rational use of oil and gas pipes with increased corrosion resistance can be used to increase the economic efficiency of production in the oil and gas industry.


Sign in / Sign up

Export Citation Format

Share Document