Ten Year Interim Report of Thermal Sprayed Zn, Al, and Zn-Al Coatings Exposed to Marine Corrosion by Japan Association of Corrosion Control

2000 ◽  
Author(s):  
S. Kuroda ◽  
M. Takemoto
Keyword(s):  
Field Test ◽  
Coastal Area ◽  
Corrosion Test ◽  
Flame Spraying ◽  
Interim Report ◽  
Corrosion Control ◽  
Corrosion Performance ◽  
Marine Corrosion ◽  
Sprayed Coating ◽  
Spray Treatment

Abstract Thermal spray committee of Japan Association of Corrosion Control (JACC) has been conducting a corrosion test of thermal sprayed Zn, Al and Zn-Al coatings at coastal area since 1985. Twelve kinds of sprayed coating were deposited onto steel pipe by arc- and flame-spraying at varied thickness and subjected to various post-spray treatment. The samples were set vertically into the seawater at a port 80 km south from Tokyo. Corrosion performance were inspected annually by recording the appearance and coatings' thickness at sea air-, splash- and tidal-zones. No significant changes were observed for five years exposure. After 7 years, however, Zn coatings with and without sealing started to suffer degradation in the immersed portion. Contrary to this, Al and Zn-Al coatings still exhibit superb corrosion performance. The test will be continued till 2001 to finish a 15 years field test. This paper reports the summary of corrosion performance of sprayed coating during the first 10 year period.

scholarly journals Atmospheric corrosion performance of different steels in early exposure in the coastal area region West Java, Indonesia

2018 ◽  
Author(s):  
Lutviasari Nuraini ◽  
Siska Prifiharni ◽  
Gadang Priyotomo ◽  
Sundjono ◽  
Hadi Gunawan ◽  
...  
Keyword(s):  
Coastal Area ◽  
Atmospheric Corrosion ◽  
Early Exposure ◽  
Corrosion Performance ◽  
West Java

A STUDY OF COMPOSITE COATINGS ON 22MnCrNiMo STEEL FOR MOORING CHAIN

2018 ◽  
Vol 25 (03) ◽  
pp. 1850074
Author(s):  
YAN SHEN ◽  
PRASANTA K. SAHOO ◽  
YIPENG PAN
Keyword(s):  
Corrosion Resistance ◽  
Experimental Work ◽  
Structural Characteristics ◽  
Composite Coatings ◽  
Salt Spray ◽  
Corrosion Performance ◽  
Sic Particles ◽  
Pulsed Electrodeposition ◽  
Mooring Chain ◽  
Spray Treatment

In order to enhance the corrosion resistance of mooring chain, the composite coatings are carried out on the surface of 22MnCrNiMo steel for mooring chain by double-pulsed electrodeposition technology using centrifugal force in the rotating device. The microstructure and anti-corrosion performance of the composite coatings have been investigated experimentally. This paper mainly focuses on the experimental work to determine the structural characteristics and corrosion resistance of composite coatings in the presence of nano-SiC. The results show that the presence of nano-SiC has a significant effect on the preparation of composite coating during the process. The surface of the coating becomes compact and smooth at a moderate concentration of nano-SiC particles. Furthermore, the best corrosion resistance of the composite coatings can be obtained when the concentration of nano-SiC particles is 2.0[Formula: see text]g.L[Formula: see text] after salt spray treatment.

The evaluation of microstructure characteristic and corrosion performance of laser-re-melted Fe-based amorphous coating deposited via plasma spraying

2019 ◽  
Vol 9 (9) ◽  
pp. 1100-1105
Author(s):  
Xiao-Lin Zhang ◽  
Chao-Ping Jiang ◽  
Feng-Ying Zhang ◽  
Ya-Zhe Xing
Keyword(s):  
Carbon Steel ◽  
Laser Energy ◽  
Melting Process ◽  
Corrosion Property ◽  
Amorphous Coating ◽  
Corrosion Performance ◽  
X Ray Diffraction ◽  
Porosity Ratio ◽  
Sprayed Coating ◽  
Plasma Sprayed

The laser re-melting treatment was performed on the plasma-sprayed Fe-based amorphous coating to ameliorate the corrosion performance of the coating. The re-melting depth was about 200 μm which was mainly controlled by laser energy input, beam speed and facular dimension. The microstructure was characterized by scanning electron microscope (SEM), and X-ray diffraction (XRD). The corrosion property of the coatings was addressed via electrochemistry methods in a 3.5 wt.% NaCl solution. The results indicate that the plasma-sprayed coating becomes much denser after laser re-melting treatment. The connected porosity ratio in as-sprayed coating dramatically reduces from 16.3% to 2.4% after laser re-melting. The as-sprayed coating mainly contains amorphous and much limited crystal phase, and some amorphous phase in the as-sprayed coating crystalizes during laser re-melting. Polarization test demonstrated that the as-sprayed coating has a significantly dramatical effect for improving corrosion performance of carbon steel, while the laser re-melting process is a more efficient method. The influence level of the coating compactness in this study is roughly two times as big as that of amorphous in coating, in the term of improving corrosion resistance of carbon steel.

Ceramic and Cermet Coatings for Cylinder Liner in Ultra Light Weight Engines - Novel Processing and Manufacturing of Ceramic Layer Composites

2006 ◽  
Vol 45 ◽  
pp. 1330-1335 ◽  
Author(s):  
Rainer Gadow ◽  
D. López ◽  
A. Candel
Keyword(s):  
Cylinder Liner ◽  
Cost Effective ◽  
Light Metal ◽  
Engine Block ◽  
Flame Spraying ◽  
Light Weight ◽  
Operation Conditions ◽  
Novel Processing ◽  
Sprayed Coating ◽  
The Cost

Actual requirements in the automotive industry are the reduction of fuel consumption and pollution emission, engine efficiency improvement, as well as cost reduction. Most of these requirements are fulfilled by reducing the total weight of the vehicle. This results in an increasing utilization of light metal components for engine applications. Significant weight savings are obtained by changing the engine block material from cast iron to aluminum or even to magnesium aluminum hybrid constructions. Despite of all advantages the industrial implementation of light metals is often inhibited by their poor surface properties especially concerning wear and tribological behavior. Due to the highly loaded operation conditions a cylinder liner surface reinforcement is necessary. A very promising technological alternative is the internal cylinder reinforcement by using HVOF (high velocity oxygen fuel) sprayed coatings. By using these advanced high energetic coating technologies, material combinations containing solid lubricant ceramic dispersions can be deposited. The thermal spray processes represent a cost effective and flexible solution for ultra light weight engine technology. This research is focused on the development of HVOF sprayed coating systems for cylinder liners, the coating optimization and the cost effective implementation of this hypersonic spray technology in a series production process. It will be shown that cast engine block bores can be directly coated by using an automated HVOF process, obtaining improved coating results. The internal coating process by hypersonic flame spraying is a superior technological alternative to the APS process for high quality cylinder liner and engine crankcase applications.

ELECTROCHEMICAL EVALUATION OF COATINGS FOR MARINE CORROSION CONTROL

1998 ◽  
pp. 163-180
Author(s):  
P.L. Bonora ◽  
F. Deflorian ◽  
L. Fedrizzi ◽  
S. Rossi
Keyword(s):  
Corrosion Control ◽  
Marine Corrosion ◽  
Electrochemical Evaluation

Corrosion Behavior and Safety Analysis of 80S Steel in H2S/CO2 Environment

2019 ◽  
Vol 944 ◽  
pp. 862-866
Author(s):  
Yong Qiang Zhang ◽  
Zhi Gang Yang ◽  
Rui Min Gao ◽  
Li Liu ◽  
Zhi Fu Yin ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Corrosion Test ◽  
The Other ◽  
Test Duration ◽  
Uniform Corrosion ◽  
Corrosive Environment ◽  
Corrosion Performance ◽  
Gas Reservoir ◽  
Gas Field ◽  
Cost Factors

Cost factors must be considered in the development of Yan'an gas field. In order to evaluate the applicability of economical 80S steel in the sulfur gas reservoir environment of Yan'an gas field, the indoor corrosion test was conducted to evaluate the resistance of 80S steel to uniform corrosion and SCC resistance in CO2/H2S coexisting corrosion environment, and combined with relevant standards. The security was analyzed. The results show that the uniform corrosion rate of 80S steel is the largest at 50 °C, and it decreases first and then increases with the increase of temperature. When the loading stress is 496.8MPa (552MPa×90%),the test duration was 720h. One sample cracked and the other two parallel samples did not cracked Comprehensive anti-uniform corrosion performance and anti-SCC performance, it is believed that 80S steel has certain risks in the corrosive environment of Yan'an gas field. It needs to cooperate with other anti-corrosion measures and monitor the service of the well string at any time.

Correlation of the Results Obtained With Corrosion Inhibitors in the Laboratory and in the Field★

CORROSION ◽  
1956 ◽  
Vol 12 (1) ◽  
pp. 33-38 ◽  
Author(s):  
G. E. PURDY ◽  
WILLIAM J. RIES
Keyword(s):  
Field Test ◽  
Test Data ◽  
Corrosion Test ◽  
Corrosion Inhibitors ◽  
Oil Field ◽  
Test Method ◽  
Internal Corrosion ◽  
West Texas ◽  
Organic Inhibitors ◽  
The Many

Abstract One of the responsibilities of the oil field corrosion engineer is to correlate laboratory and field test data. With this in mind the principle factors which influence internal corrosion in oil wells (factors which the corrosion engineer must consider) are reviewed here. A laboratory corrosion test method is discussed. Corrosion rate data obtained in the laboratory with three West Texas crude oil and brine systems and the corrosion inhibition obtained in these systems with two organic inhibitors are analyzed and compared. Field corrosion test data for the same three fields are presented. The correlation of laboratory and field test data is discussed in relation to the many variables encountered. It is concluded that the evaluation of the use of inhibitors in some cases may be difficult and may require considerable experience and judgment on the part of the corrosion engineer.

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