Hydrogel-swelling driven delivery device for corrosion resistance of metal in water

2015 ◽  
Vol 72 (12) ◽  
pp. 2270-2276 ◽  
Author(s):  
Yu Gu ◽  
Li-Ming Yang ◽  
Jie Chen ◽  
Ling-Ling Wang ◽  
Bin Chen
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Water System ◽  
Carbon Steels ◽  
Delivery Device ◽  
Permeable Membrane ◽  
Constant Rate ◽  
Release Property ◽  
Hydrogel Swelling ◽  
Loss Experiment

Corrosion on steel and copper pipes in industry can trigger pollution and weakness due to undesired chemical and biochemical reactions. Too much or too little inhibitor can decrease its efficiency, even causing waste and pollution. In this contribution, an innovative delivery device driven by hydrogel swelling, mainly consisting of a semi-permeable membrane, a hydrogel-swelling force drive and a release orifice, was developed to control the release of inhibitor in a water system at a constant rate, leading the amount of inhibitor to maintain a proper concentration. The effects of hydrogel mass and orifice dimension on release property were studied for controlling release rate. Moreover, a weight loss experiment on carbon steels was carried out to show the incredible anti-corrosion function of the system.

Factors Influencing the Rate-of-Pickling Test on Tin-Plate Steel★

CORROSION ◽  
1959 ◽  
Vol 15 (3) ◽  
pp. 51-56 ◽  
Author(s):  
R. M. HUDSON ◽  
G. L. STRAGAND
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Steel Surface ◽  
Lag Time ◽  
Rate Of Change ◽  
Surface Layers ◽  
Experimental Conditions ◽  
Constant Rate ◽  
High Concentrations ◽  
Future Work

Abstract “Lag time” is a measure of the time of pickling necessary to produce a constant rate of weight loss from steel immersed in acid. This measurement has been used as a guide for improving the corrosion resistance of commercial electrolytic tin plate. It is determined by measuring either the rate of change of weight loss, hydrogen evolution, or corroding potential of a specimen in 6N hydrochloric acid at 90 C (194 F.) The lag time depends on surface effects inasmuch as removing the surface layers of steel by abrasion or by pickling destroys the lag. The influence of box-annealing atmospheres, cleanliness of steel, and time-temperature cycles on lag time have been investigated, and the complexity of these effects has been demonstrated. Explanations in terms of oxidation or decarburization of the steel surface during annealing are not feasible for the development of lag time under all the experimental conditions studied. Preliminary data demonstrating the high concentrations of certain elements on the steel surface before annealing, and the enrichment of the surface layer by some of these elements during annealing, are suggested as particularly promising areas for future work. In this way lag time phenomena in tin-plate steels may be better understood and further improvement in tin-plate corrosion resistance can be made. 2.3.4

Study on Corrosion Resistance of Brass in Circulating Cooling Water with Different Concentration Ratio

2012 ◽  
Vol 511 ◽  
pp. 70-73
Author(s):  
Yu Chun Li ◽  
Xiao Wei Liu ◽  
Rui Feng Zhang ◽  
Kang Juan ◽  
Fan Gao
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Concentration Ratio ◽  
Water System ◽  
Cooling Water ◽  
Cooling Water System ◽  
Circulating Cooling Water ◽  
Weight Loss Method ◽  
Ratio Condition ◽  
Loss Method

Abstract: The corrosion resistance of brass H70-1A cooling water was studied through weight-loss method and electrochemistry measurement in different concentration ratio condition. The results obtained from this study showed that brass inhibitor was necessary to add to circulating cooling water system when concentration ratio was in the range of 3~7.

scholarly journals Mechanical properties and corrosion resistance of normal strength and high strength steels in chloride solution

2011 ◽  
Vol 7 (2) ◽  
pp. 94-100 ◽  
Author(s):  
Ahmad Rahbar Ranji ◽  
Amir Hamed Zakeri
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Corrosion Resistance ◽  
Ultimate Strength ◽  
Chloride Solution ◽  
High Strength Steels ◽  
High Strength ◽  
Carbon Steels ◽  
Tension Test ◽  
Normal Strength

The corrosion resistance (weight loss) and mechanical properties (i.e. yield strength, ultimate strength and elongation) for three carbon steels, normal strength and high strength steels using tension test are investigated. The specimens are kept in chloride solution (20% NaCl) up to 240 hours. At every 48 hours, thickness and weight loss is measured and tension test is carried out. It was found that the susceptibility of the steels to corrosion based on their weight loss were identical prior to 144 hours, after that is accelerated for high strength steel. In addition, it was found that manganese (Mn) has reduced corrosion rate at early stage of corrosion. The change in mechanical properties by corrosion for all steels are the same, and ultimate strength is reduced, which for limit state design of aged structure should be taken into account.DOI: 10.3329/jname.v7i2.5309

Effect of Plastic Deformation On the Corrosion of Iron and Steel

CORROSION ◽  
1964 ◽  
Vol 20 (9) ◽  
pp. 293t-298t ◽  
Author(s):  
N. D. GREENE ◽  
G. A. SALTZMAN
Keyword(s):  
Plastic Deformation ◽  
Weight Loss ◽  
Corrosion Resistance ◽  
Cold Work ◽  
Carbon Steels ◽  
Electrochemical Measurements ◽  
Acid Solutions ◽  
Iron And Steel ◽  
Sulfuric And Hydrochloric Acids ◽  
Corrosion Of Iron

Abstract Cold work markedly decreases the corrosion resistance of steel in acid solutions. This effect has been studied by electrochemical measurements and weight loss tests on zone-refined iron and carbon steels exposed to sulfuric and hydrochloric acids. The mechanism of this phenomenon is discussed in detail.

Enhanced Corrosion Resistance and Damping Capacity of As-Cast AZ91 Magnesium Alloys with Ce Addition

2011 ◽  
Vol 418-420 ◽  
pp. 246-249 ◽  
Author(s):  
Di Qing Wan
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Secondary Phase ◽  
Damping Capacity ◽  
Nacl Solution ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium ◽  
Morphology Modification ◽  
Loss Experiment

Through the weight loss experiment in 3.5%NaCl solution, the effect of Ce contents on the corrosion resistance of AZ91 magnesium alloy was carried out. In addition, the damping performance of Ce added AZ91 alloys were also studied. The result shows that adding Ce can significantly improve the corrosion resistance and damping capacity of AZ91 magnesium alloy; the grain refinement and secondary phase morphology modification can contribute to those properties improvement.

OM-METAL

Alloy Digest ◽  
1974 ◽  
Vol 23 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Water System ◽  
Heat Treating ◽  
Brass Alloy ◽  
Corrosion Resistant

Abstract OM-METAL is a new, corrosion-resistant brass alloy. It has excellent resistance to dezincification which makes it highly suitable for water-system applications, decorative parts and marine fittings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: Cu-279. Producer or source: American Smelting and Refining Company.

S-TEN1

Alloy Digest ◽  
2005 ◽  
Vol 54 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Carbon Steels ◽  
Dew Point ◽  
Steel Alloy ◽  
Temperature Performance ◽  
Nippon Steel Corporation ◽  
Steel Corporation

Abstract S-TEN1 is a steel alloy containing copper and antimony to make it more resistant to dew-point corrosion than conventional carbon steels. It is used as tubing in economizers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SA-550. Producer or source: Nippon Steel USA Inc., Nippon Steel Corporation.

DYNALLOY

Alloy Digest ◽  
1957 ◽  
Vol 6 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Atmospheric Corrosion ◽  
High Strength ◽  
Heat Treating ◽  
Carbon Steels ◽  
Rolled Steel ◽  
Bend Strength ◽  
Steel Company

Abstract DYNALLOY is a versatile low-alloy, high-strength, flat rolled steel which combines high physical properties with ductility and weldability. It has higher atmospheric corrosion resistance, and also higher resistance to abrasion, impact and fatigue than plain carbon steels. This datasheet provides information on composition, tensile properties, and bend strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-56. Producer or source: Alan Wood Steel Company.

scholarly journals Analysis of Corrosion of Hastelloy-N, Alloy X750, SS316 and SS304 in Molten Salt High-Temperature Environment

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 543
Author(s):  
Ketan Kumar Sandhi ◽  
Jerzy Szpunar
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Molten Salt ◽  
Corrosion Damage ◽  
Nickel Superalloy ◽  
Triple Junctions ◽  
Salt Corrosion ◽  
Molten Fluoride ◽  
Stainless Steel 316

Nickel superalloy Hastelloy-N, alloy X-750, stainless steel 316 (SS316), and stainless steel 304 (SS304) are among the alloys used in the construction of molten salt reactor (MSR). These alloys were analyzed for their corrosion resistance behavior in molten fluoride salt, a coolant used in MSR reactors with 46.5% LiF+ 11.5% NaF+ 42% KF. The corrosion tests were run at 700 °C for 100 h under the Ar cover gas. After corrosion, significant weight loss was observed in the alloy X750. Weight loss registered in SS316 and SS304 was also high. However, Hastelloy-N gained weight after exposure to molten salt corrosion. This could be attributed to electrochemical plating of corrosion products from other alloys on Hastelloy-N surface. SEM–energy-dispersive X-ray spectroscopy (EDXS) scans of cross-section of alloys revealed maximum corrosion damage to the depth of 250 µm in X750, in contrast to only 20 µm on Hastelloy-N. XPS wide survey scans revealed the presence of Fe, Cr, and Ni elements on the surface of all corroded alloys. In addition, Cr clusters were formed at the triple junctions of grains, as confirmed by SEM–EBSD (Electron Back Scattered Diffraction) analysis. The order of corrosion resistance in FLiNaK environment was X750 < SS316 < SS304 < Hastelloy-N.

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