Question

In: Chemistry

With the aid of a sketch, describe the mechanism of crevice corrosion of metals. In your...

  1. With the aid of a sketch, describe the mechanism of crevice corrosion of metals. In your answer, you should indicate the location of the different reactions, give the equations for the reactions, and state the condition for a crevice to continue to grow.

Solutions

Expert Solution

condtions to crevice to grow

1) presence of elctrolyte like NaCl and other incerases the rate of corrosion and crevice will grow

2) differential concentarioan of chemicals like Oxygen and other electrolyte increases rate of crevice corrosion

3)presence air , moisture also increases crevise corrosion


Related Solutions

Describe the Bohr model of the hydrogen atom with the aid of a sketch and an...
Describe the Bohr model of the hydrogen atom with the aid of a sketch and an equation for the allowed state energies for which the ground state energy is -13.61 eV. Define all variables used. [2 marks] (b) De Broglie’s equation defines a wavelength for a particle, yet in the view of quantum mechanics, matter is in the form of particles and not waves. Explain how this apparent paradox is resolved by carefully defining the variables in de Broglie’s equation....
1. (a) With the aid of a labeled sketch, describe an apparatus for the generation of...
1. (a) With the aid of a labeled sketch, describe an apparatus for the generation of x-rays. (b) With the aid of labeled sketches, describe the three primary physical mechanisms for the absorption of x-rays in solids. (c) Make a sketch of a typical x-ray spectrum generated by a hospital apparatus, labeling three primary features of the spectrum. (d) For an x-ray apparatus containing a molybdenum target of atomic number, z = 42: (i) What is the wavelength for the...
With the aid of a labeled sketch, describe an apparatus for the generation of x-rays. [2]...
With the aid of a labeled sketch, describe an apparatus for the generation of x-rays. [2] (b) With the aid of labeled sketches, describe the three primary physical mechanisms for the absorption of x-rays in solids. [2] (c) Make a sketch of a typical x-ray spectrum generated by a hospital apparatus, labeling three primary features of the spectrum. [2] (d) For an x-ray apparatus containing a molybdenum target of atomic number, z = 42: (i) What is the wavelength for...
Describe briefly with the aid of suitable diagrams the mechanism of the lightning stroke generation.
Describe briefly with the aid of suitable diagrams the mechanism of the lightning stroke generation.
Regarding the fracture mechanism of metals, polymers and ceramics (a) Explain why FCC metals show a...
Regarding the fracture mechanism of metals, polymers and ceramics (a) Explain why FCC metals show a ductile fracture even at low temperatures while BCC metals do not. (b) What is crazing? What can you say about the Poisson’s ratio of the crazed material? (c) Generally, in ceramics, intergranular fracture is preferred to cleavage fracture; however, in metals, transgranular fracture is the preferred mechanism for brittle failure. Why? Use a physical reason supported with an equation in your answer.
Describe corrosion as it pertains to metallic implants. Explain the effect of passivation on corrosion and...
Describe corrosion as it pertains to metallic implants. Explain the effect of passivation on corrosion and how it functions.
In your own words (and with the aid of a figure), describe the products of the...
In your own words (and with the aid of a figure), describe the products of the natural and artificial reactions catalysed by the enzyme. Include in your answer, the special name of the bond that is broken in this type of reaction. Which additional molecule is required to complete this task.
Q1 a) With the aid of a sketch of the hydraulic system explain the following i)...
Q1 a) With the aid of a sketch of the hydraulic system explain the following i) A Reservoir ii) A pump and a prime mover iii) A pressure control and check valve iv) A power circuit which is made of actuators, motors or cylinders. v) Filter b) List three functions that are performed by a reservoir and the purpose of baffles in it. Q2 a) Define the term ‘Filtration’ in a hydraulic system. b) Explain the difference between a depth...
1) How does the coating in metals prevent a) corrosion b) stop flamability c) wear d)...
1) How does the coating in metals prevent a) corrosion b) stop flamability c) wear d) UV - radiation
Sketch the energy band diagrams for metals, insulators and semiconductors and explain the how they differ...
Sketch the energy band diagrams for metals, insulators and semiconductors and explain the how they differ based on the bandgap, density of states and conductivity.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT