Influence of parameters related to microstructure, chemical composition and environment characteristics on localized corrosion failure susceptibility of supermartensitic stainless steels

2021 ◽  
pp. 105524
Author(s):  
C.V.L. Sabará ◽  
L.N.S. Prachedes ◽  
L.C. Santos ◽  
M.A. Sabará ◽  
R.C. Souza ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Stainless Steels ◽  
Localized Corrosion ◽  
Corrosion Failure

The Use and Misuse of 300 Series Austenitic Stainless Steels in the Citrus Industry

2007 ◽  
Author(s):  
Richard O. Lewis
Keyword(s):  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Localized Corrosion ◽  
Process Equipment ◽  
Citrus Industry ◽  
Corrosion Failure ◽  
Piping Systems ◽  
Process System ◽  
Long Term Performance ◽  
Term Performance

The 300 series austenitic stainless steels have been used extensively and successfully in the Citrus Industry for numerous applications. Material cost and corrosion resistance to both citrus products and cleaning solutions for maintaining sanitary conditions has made type 304 and type 316 stainless steels the material of choice for process equipment, tanks, and piping systems. However, corrosion failures have occurred and many have been the subject of forensic investigations to determine the cause and provide recommendations to avoid future, similar problems. Historically, the primary modes of corrosion failure of T304SS and T316SS have been experienced not only in the Citrus Industry but also in the chemical and petrochemical industries. These modes of corrosion include localized corrosion in the form of pitting and crevice corrosion, and stress corrosion cracking. Successful long-term performance is best obtained when (1) the correct alloy is selected for the application; (2) piping and equipment are carefully fabricated and passivated prior to being placed in service; and (3) the process system design and operation minimizes stagnation and solids deposition, especially at elevated temperature. A table listing the composition of the most commonly available and specified 300 series austenitic stainless steels is shown in Table 1. Paper published with permission.

Kerusakan Pada Material Pipa Air Bersih Akibat General Corrosion

2019 ◽  
Vol 16 (2) ◽  
Author(s):  
M. N. Setia Nusa
Keyword(s):  
Chemical Composition ◽  
Failure Analysis ◽  
External Surface ◽  
Internal Surface ◽  
General Corrosion ◽  
Water Pipe ◽  
Corrosion Attack ◽  
Corrosion Failure ◽  
Environment Factor

Water pipe of 4.5” diameter and has been operated for 8 year having failure due to corrosion attack on its external and internal surface. It is conducted failure analysis to find out the cause of corrosion by having testing examination of visual fractography, metalography,, SEM EDAX, hardness and chemical composition. Testing and examination results show that the failure / corroded pipe has a for in of general corrosion on the external surface due to environment factor or ground factor arround the pipe and on the internal surface was influenced by excessive root weld creating protrude which then causing turbolens and deposite to accelerate corrosion attack.Pipa berdiameter 4.5” yang berfungsi mengalirkan air bersih dan telah beroperasi selama 8 tahun, terjadi kerusakan berbentuk korosi pada permukaan luar pipa dan permukaan dalam. Untuk itu dilakukan analisa kerusakan untuk mengetahui penyebab terjadinya korosi dengan pengujian dan pemeriksaan secara visual,Fractography, Metallography, SEM, EDAX, Uji Kekerasan dan Uji Komposisi Kimia. Hasil pemeriksaan dan pengujian pada pipa yang rusak / korosi berbentuk jenis general korosi pada permukaan luar pipa yang diakibatkan faktor lingkungan atau tanah disekitar pipa, sedangkan pada bagian dalam pipa dipengaruhi oleh adanya lelehan pengelasan yang kurang sempurna sehingga menimbulkan benjolan yang mengakibatkan aliran air didalam pipa tidak lancar sehingga terjadi turbolensi yang menimbulkan endapan dan mengakibatkan percepatan terjadinya korosi.Keywords: Pipe, environtment, turbolens, corrosion, failure

Chemical composition and electronic structure of the passive layer formed on stainless steels in a glucose-oxidase solution

2008 ◽  
Vol 54 (1) ◽  
pp. 123-132 ◽  
Author(s):  
C. Marconnet ◽  
Y. Wouters ◽  
F. Miserque ◽  
C. Dagbert ◽  
J.-P. Petit ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Chemical Composition ◽  
Glucose Oxidase ◽  
Stainless Steels ◽  
Passive Layer
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