Jiangsu Linlong New Materials Co.

Wuxi, China

Jiangsu Linlong New Materials Co.

Wuxi, China
SEARCH FILTERS
Time filter
Source Type

Jiang Q.,Yancheng Institute of Technology | Jiang Q.,Nanjing University of Aeronautics and Astronautics | Miao Q.,Nanjing University of Aeronautics and Astronautics | Liang W.,Nanjing University of Aeronautics and Astronautics | And 4 more authors.
Journal of the Chinese Society of Corrosion and Protection | Year: 2015

The microstructure and corrosion performance in 3.5% NaCl solution of an Al-Zn-Si-RE containing water-borne coating were investigated by means of SEM with EDS as well as potentiodynamic polarization curves and electrochemical impedance spectroscopy techniques (EIS). The results indicate that Al-Zn-Si-RE coating shows a typical lamellar structure, which significantly increases the length of diffusion path for corrosive species; and an excellent coating uniformity in micro scale, which may be beneficial to its protectiveness. The corrosion process of Al-Zn-Si-RE coating can be divided into four stages during immersion in 3.5%NaCl solution: I) the active corrosion of Al-Zn-Si-RE flakes on the surface layer; II) the coverage of Al-Zn-Si-RE flakes by the corrosion product layer thereby decreasing their dissolution; III) the temporary sacrificial anode protection of the coating for the steel substrate when the electrolyte reached the interface coating/substrate; IV) the barrier protection caused by corrosion products. Therefore, the protection mechanism of the coating is physical barrier combined with a weak sacrificial anode protection. © 2015, Chinese Society of Corrosion and Protection. All rights reserved.


Jiang Q.,Nanjing University of Aeronautics and Astronautics | Miao Q.,Nanjing University of Aeronautics and Astronautics | Ding X.,Nanjing Iveco Automobile Co. | Wei X.,Jiangsu Linlong New Materials Co.
Journal of the Chinese Society of Corrosion and Protection | Year: 2013

The behavior of hydrogen evolution was determined by gas volumetric measurement over a period of 72 h at 45 °C. The inhibiting effectiveness of ten kinds of corrosion inhibitors on Al-Zn-Si alloy powders in a solution of water with 10 mass% C6Hi402 was compared. The investigations of Al-Zn-Si samples were carried out by use of IR, SEM and XRD. It has been shown that the hydrogen evolution of flake Al-Zn-Si powder can be inhibited by the addition of TBAB and HEDP with an optimal concentration of TBAB/Al-Zn-Si=50(mass%) and HEDP/ Al-Zn-Si=100(mass%) in 2-butoxyothanol aqueous solutions the inhibition efficiency can reach 78.99% and 62.77%, respectively. At last, Pourbaix diagram was used to analyse the microgalvanic corrosion of Al-Zn-Si alloy powder in aqueous media, and the inhibition mechanism of the inhibitors TBAB was discussed briefly.


Jiang Q.,Nanjing University of Aeronautics and Astronautics | Miao Q.,Nanjing University of Aeronautics and Astronautics | Liang W.-P.,Nanjing University of Aeronautics and Astronautics | Ying F.,Jiangsu Linlong New Materials Co. | And 5 more authors.
Electrochimica Acta | Year: 2014

Al-Zn-Si-RE coating was deposited on mild steel by arc spraying Al-Zn based alloy wire with a high Al content. The corrosion behavior of Al-Zn-Si-RE coating was investigated by corrosion morphologies and electrochemical measurements. The results indicated that Al-Zn-Si-RE coating exhibited homogeneous distributions of elements and a dense homogeneous lamellar microstructure with good scale adhesion. The phases of the coatings are Zn-rich phase, Al-rich phase, Al0.403Zn0.597 and Al9Si phase. Corrosion products had been deposited in the defects, which caused self-sealing behavior and hindered further corrosion. Corrosion products formed on Al-Zn-Si-RE coating surface consisted mainly of simonkolleite [Zn 5(OH)8Cl2·H2O], zinc aluminum hydrotalcites [Zn0.71Al0.29(OH)2(CO 3)0.145·xH2O, Zn0.70Al 0.30(OH)2(CO3)0.15·xH 2O, Zn6Al2(OH)16CO 3·4H2O] and aluminum chloride hydroxide hydrate [Al5Cl3(OH)12·4H2O]. Corrosion products had been deposited in the defects, which caused self-sealing behavior and hindered further corrosion. Furthermore, sacrificial anodic protection played a dominant role during the corrosion process. There were different corrosion stages of the coating in sodium chloride solution, such as pitting-dissolution-redeposition, active dissolution, cathodic protection and physical barriers caused by corrosion products. Finally, schematic model of the protective mechanisms of Al-Zn-Si-RE coating during immersion in sodium chloride solution was given. © 2013 Published by Elsevier Ltd.


Patent
Jiangsu Linlong New Materials Co. | Date: 2010-03-31

The invention relates to hot-dip cast aluminum alloy for anticorrosion treatment on engineering parts resistant to marine climate and a preparation method thereof, wherein said cast aluminum alloy contains Al, Zn, Si, Mg, RE, Ti, Ni and nanometer oxide particle reinforcing agent, said nanometer oxide particle reinforcing agent is selected from one or two of TiO_(2 )and CeO_(2), the mass percentage of the components is as follows: Zn: 35-58%, Si: 0.3-4.0%, Mg: 0.1-5.0%, RE: 0.02-1.0%, Ti: 0.01-0.5%, Ni: 0.1-3.0%, and the total content of the nanometer oxide particle reinforcing agent: 0.01-1.0%; and the balance consists of Al and unavoidable impurities. The coating using cast aluminum alloy prepared by the invention has sufficient corrosion resistance and scour resistance in marine climate


The invention relates to a method for preparing a coating resistant to contact corrosion on the surface of titanium alloy, which comprises the following steps: 1. carrying out degreasing and derusting to a titanium alloy part; 2. carrying out etching treatment on the titanium alloy part; 3. carrying out surface activation treatment on the titanium alloy part; 4. preheating the titanium alloy part in an atmosphere protection furnace; 5. immersing the preheated titanium alloy part in plating solution; and 6. carrying out diffusion treatment on the immersion-plated titanium alloy part in a vacuum furnace whereby atoms at the interface diffuse to form a diffusion layer on a substrate and thus form a plating diffusion composite layer on the surface of the titanium alloy part. The part treated by the method completely solves the problem of contact corrosion of titanium alloy contacting with aluminum alloy and steel material.


Patent
Jiangsu Linlong New Materials Co. | Date: 2012-11-07

The invention relates to a method for carrying out a diffusion treatment on a coating of engineering parts resistant to marine climate. The method comprises the following steps: 1. pre-treating the parts; 2. pre-heating the parts in a protective atmosphere furnace; 3. immersing the pre-heated parts in a plating solution in a way that the parts are rotated in the submerging process; 4. undergoing the diffusion treatment, particularly, putting the immersion-plated parts into a vacuum furnace, holding at 800 to 950 C for 1 to 3 hours, then, reducing the temperature gradually and taking out the parts, and forming a diffusion layer on a substrate through the diffusion of atoms at the interface to achieve the metallurgical combination between the coating and the substrate. The parts treated by the method of the invention are highly resistant to corrosion and scouring erosion under the condition of marine climate.


The invention relates to a special hot-dip plating alloy for a coating on the surface of a titanium alloy part, wherein the hot-dip plating alloy contains the following components by mass percentage: 8-24 % of Si, 1.2-3.1 % of Zn, 0.02-0.5 % of RE, 0.5-3.2 % of Mg, 0.05-1 % of Fe, 0.05-0.5 % of Cu, 1.0-2.0 % of Mn, 0.5-2.0 % of Cr, 0.02-0.5 % of Zr, 1-2 % of a nano-oxide particle reinforcing agent and the balance of Al and inevitable impurities, and the nano-oxide particle reinforcing agent is selected from one or two of TiO_(2) and CeO_(2). The adoption of the hot-dip plating alloy produced by the invention can form a coating which has corrosion resistance and good wear resistance, and is well metallurgically bonded with a matrix on the surface of the titanium alloy.


Patent
Jiangsu Linlong New Materials Co. | Date: 2012-09-26

The invention relates to a hot-dip cast aluminum alloy for anticorrosion treatment on engineering parts resistant to marine climate and a preparation method thereof, wherein said cast aluminum alloy contains Al, Zn, Si, Mg, RE, Ti, Ni and a nanometer oxide particle reinforcing agent, said nanometer oxide particle reinforcing agent is selected from one or two of TiO_(2) and CeO_(2), the mass percentage of the components is as follows: Zn: 35-58 %, Si: 0.3-4.0 %, Mg: 0.1-5.0 %, RE: 0.02-1.0 %, Ti: 0.01-0.5 %, Ni: 0.1-3.0 %, and the total content of the nanometer oxide particle reinforcing agent: 0.01-1.0 %; and the balance consists of Al and inavoidable impurities. A coating using a cast aluminum alloy prepared by the invention has sufficient corrosion resistance and scour resistance in marine climate.


Patent
Jiangsu Linlong New Materials Co. | Date: 2010-03-31

The invention relates to a special hot-dip plating alloy for a coating on the surface of a titanium alloy part, wherein the hot-dip plating alloy contains the following components by mass percentage: 8-24% of Si, 1.2-3.1% of Zn, 0.02-0.5% of RE, 0.5-3.2% of Mg, 0.05-1% of Fe, 0.05-0.5% of Cu, 1.0-2.0% of Mn, 0.5-2.0% of Cr, 0.02-0.5% of Zr, 1-2% of nano-oxide particle reinforcing agent and the balance of Al and inevitable impurities, and the nano-oxide particle reinforcing agent is selected from one or two of TiO_(2 )and CeO_(2). The adoption of the hot-dip plating alloy produced by the invention can form the coating which has corrosion resistance and good wear resistance, and is well metallurgically bonded with a matrix on the surface of the titanium alloy.


The invention relates to a method for carrying out the diffusion treatment on the coating of engineering parts resistant to marine climate. The method comprises the following steps: 1. pre-treating the parts; 2. pre-heating the parts in a protective atmosphere furnace; 3. immersing the pre-heated parts in a plating solution in away that the parts are rotated in the submerging process; 4. undergoing the diffusion treatment, particularly, putting the immersion-plated parts into a vacuum furnace, holding at 800 to 950 DEG C for 1 to 3 hours, then reducing the temperature gradually and taking out the parts, and forming a diffusion layer on a substrate through the diffusion of atoms at the interface to achieve the metallurgical combination between the coating and the substrate. The parts treated by the method of the invention are highly resistant to corrosion and scouring erosion under the condition of marine climate.

Loading Jiangsu Linlong New Materials Co. collaborators
Loading Jiangsu Linlong New Materials Co. collaborators