Corrosion Control - Quiz

Quiz Question

1.	Which of the following methods are used to protect metals against corrosion?
		Inhibitors
		Surface Coating
		Electrical protection
		All the above
2.	A hot dipped galvanized coating will provide greater corrosion protection to steel when compared to that of an electroplated product.
		True
		False
3.	The following figure reresents _____________.?
		Basic concept of hot dipped tin plating process
		Galvanization
		Hot dip of Zn
4.	Oxidation, Phosphating, Enamels processes etc comes under _______________.?
		Methods of Inorganic coating
		Methods of organic coating
5.	Chromate inhibitors are the most effective of the anodic inhibitors however they are toxic to most organisms.
		True
		False
6.	If the Soil resistivity range (ohm-cm) is 10,000 to 30,000 then Corrosivity is likely to be _____________.?
		Severe
		Moderate to severe
		Mild
		Not likely
7.	The following figure represents _____________.?
		Bad design of bolted joint
		Good design of bolted joint
8.	The decrease in the rate of corrosion beyond 80 C is attributed to the __________ in O2 solubility in water.
		Decrease
		Increase
		Steadiness
9.	_______________ appears when the chemical reaction step is the controlling step and is defined as the retardation of an electrochemical process due to the slowness of the charge transfer step.
		Concentration Polarization
		Activation Polarization
		Reacting Polarization
		None of the above
10.	Which of the following metals show passive behavior?
		Cr
		Fe
		Ni
		All the above