Cavitation Erosion and Corrosion of Pearlitic Gray Cast Iron in Non-Standardized Cavitation Conditions

A results of test of erosion and corrosion resistance of pearlitic gray cast iron (grade EN GJ 400) are showed. The NaCl solutions and of ethylene glycol solutions were used as the test environment. Examination were performed at varying cavitation load, in the range 2,8 ÷ 20 W/cm2.

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Improvement Corrosion Resistance of Gray Cast Iron Grade FC220 on Chromizing Process by Separate Cr Powder and NH4Cl Powder System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.799-800.397 ◽

2015 ◽

Vol 799-800 ◽

pp. 397-401

Author(s):

Pudsadee Chupong ◽

Pijan Jornsanoh ◽

Karuna Tuchinda ◽

Anantawit Tuchinda

Keyword(s):

Corrosion Resistance ◽

Cast Iron ◽

Gray Cast Iron ◽

Salt Spray ◽

Gray Cast ◽

Experimental Setup ◽

Micro Hardness ◽

Powder System ◽

Iron Grade ◽

Scanning Electron

A new configuration of chromizing process was developed by separating Cr powder from NH4Cl. FC220 gray cast iron specimens were chromized in this new experimental setup at 450, 550, 650,750, 850 and 950°C during 13 hours in order to study the possibility of chromizing at “low” temperature. The chromized specimens were examined using Scanning Electron Microscopy (SEM), macro-hardness, micro-hardness, compression test and salt spray test. The results shows that the specimen chromized at 650°C gives the best compromise between the corrosion resistance and the hardness of the FC220 with 1.73 ڌm of thickness of the chromized layer. However, after 13 hours of the process, the hardness of the FC220 specimens decreased considerably from 93 HRB to 64.2 HRB (31%).

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The Mechanism of Cavitation Erosion

Journal of Applied Mechanics ◽

10.1115/1.4009159 ◽

1942 ◽

Vol 9 (1) ◽

pp. A31-A37

Author(s):

T. C. Poulter

Keyword(s):

Corrosion Resistance ◽

Cast Iron ◽

Cavitation Erosion ◽

Gray Cast Iron ◽

Protective Coatings ◽

Gray Cast ◽

Paraffin Oil ◽

Water Alcohol

Abstract After pointing out the interrelation between corrosion resistance, caustic embrittlement, fatigue, creep, and other phenomena of metals, the author cites the results of experiments on glass and quartz rods, subjected to high liquid pressures, as indicative of the action which probably occurs in cavitation erosion. To demonstrate the mechanism of cavitation on this basis, an investigation was conducted, in which tests were made on gray-cast-iron specimens in water, alcohol, glycerin, and paraffin oil, using a magnetostriction oscillator as the source of energy. The results of the tests which are reported bear out the theory. Materials and protective coatings which reduce cavitation erosion greatly, and the effect of the presence of hydrogen in the liquid are discussed.

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MEEHANITE GF-20

Alloy Digest ◽

10.31399/asm.ad.ci0039 ◽

1973 ◽

Vol 22 (2) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Shear Strength ◽

Cast Iron ◽

Physical Properties ◽

Surface Treatment ◽

Tensile Properties ◽

Gray Cast Iron ◽

Heat Treating ◽

Gray Cast

Abstract MEEHANITE GF-20 is a gray cast iron designed principally for high machinability and is used where strength is not an important factor. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: CI-39. Producer or source: Meehanite Metal Corporation.

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