جلوگیری از خوردگی فولاد کربنی در حین اسیدشویی

Corrosion inhibition of carbon steel during acid pickling

جلوگیری از خوردگی فولاد کربنی در حین اسیدشویی

ABSTRACT

A novel cationic surfactant, N-(2-(2-mercaptoacetoxy)ethyl)-N,N-dimethyl dodecan-1-aminium bromide), has been synthesized to study its corrosion inhibiting effect against carbon steel in 1.0 M HCl solution. The corrosion inhibition efficiency was measured by using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and weight loss methods. The inhibition efficiencies obtained from these methods were in good agreement. The inhibition efficiency slightly decreased in the temperature range 30–60 °C. The synthesized inhibitor acted as a mixed inhibitor. Thermodynamic adsorption and activation parameters were discussed. Adsorption of the synthesized inhibitor was found to follow the Langmuir adsorption isotherm. A chemical adsorption mechanism is proposed.

 

انتخاب پوشش Coating Selection

Coating Selection

انتخاب پوشش

ABSTRACT

An improved approach to coating selection should thus allow progressive elimination and lend itself to a computerised implementation. Furthermore, an approach which avoids the identification of one dominant wear mechanism would be desirable. A systematic framework fulfilling these goals is described below. This is intended to provide a basis for minimising the probability of tribological problems by indicating the material property limitations and characteristics needed (Matthews et. al., 1992b). 

 

مهندسی سطح surface engineering

surface engineering

مهندسی سطح

ABSTRACT

Surface engineering encompasses the research and technical activity aimed at the design, manufacturing, investigation and utilization of surface layers, both for technological and for end use, with properties better than those of the core [7] Surface engineering can be the key to improve performance for many products by improving their properties, such as corrosion resistance, wear resistance, fatigue limit etc Surface engineering practices play a major role in ameliorating problems and enhancing prospects for advancement in three major areas of technology, corrosion, wear and manufacturing [8] The expanding use of surface engineering generated a need for understanding or at least an awareness of the physical and chemical properties of materials (coatings/substrate), their mechanical properties and especially structure/property relationships in materials

 

خوردگی فرسایشی مواد برای کاشتنی های ارتوپدی

Fretting corrosion of materials for orthopaedic implants:

a study of a metal/polymer contact in an artificial physiological medium

خوردگی فرسایشی مواد برای کاشتنی های ارتوپدی :

مطالعه ارتباط فلز-پلیمر در یک محیط فیزیولوژیکی مصنوعی

ABSTRACT

The fretting corrosion behaviour of a 316L SS flat against a PMMA counterface has been investigated in an artificial physiological medium. A specific device has been used to visualize the in situ degradation at the contact interface. Simultaneous analysis of the coefficient of friction and free corrosion potential has shown four distinct stages during fretting experiments. An energy-oriented approach to the fretting process was conducted in tandem with measurement of wear. This method has shown a linear progression in the wear volume of the samples as a function of the interfacial energy dissipated during fretting. The presence of chlorides contributes to a considerable acceleration of the degradation of the stainless steel surface. This process was explained by a mechanism related to crevice corrosion activated by friction.