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Questions and Answers
Which property describes the ability of metal to regain its original shape after deformation?
Which property describes the ability of metal to regain its original shape after deformation?
- Ductility
- Brittleness
- Elasticity (correct)
- Malleability
What is the definition of malleability in metals?
What is the definition of malleability in metals?
- Resistance to deformation
- Ability to transmit heat and electricity
- Ability to be extended in all directions without fracturing (correct)
- Ability to break under a sharp blow
What process refers to hardening of metals while they are being hammered or bent?
What process refers to hardening of metals while they are being hammered or bent?
- Ductility
- Work-hardening (correct)
- Fusibility
- Age-hardening
Which property of metals describes the resistance to a pulling force?
Which property of metals describes the resistance to a pulling force?
Which property is defined as the ability to be stretched into fine wire without fracturing?
Which property is defined as the ability to be stretched into fine wire without fracturing?
What is considered a mechanical means of protecting metals in furniture production?
What is considered a mechanical means of protecting metals in furniture production?
Which metal is used in the production of hot water pipes?
Which metal is used in the production of hot water pipes?
What is stainless steel primarily composed of?
What is stainless steel primarily composed of?
Which ferrous metal is known for being tough and ductile, making it suitable for decorative work such as screens and gates?
Which ferrous metal is known for being tough and ductile, making it suitable for decorative work such as screens and gates?
Which pure metal is described as being lustrous and reddish-brown?
Which pure metal is described as being lustrous and reddish-brown?
Which metal is a primary component of galvanized steel due to its protective properties?
Which metal is a primary component of galvanized steel due to its protective properties?
Which metal is often substituted for lead in flashings and linings and used in plating?
Which metal is often substituted for lead in flashings and linings and used in plating?
What is a characteristic feature of mud steel in terms of its carbon content?
What is a characteristic feature of mud steel in terms of its carbon content?
Which non-ferrous metal is known for its excellent thermal and electrical conductivity?
Which non-ferrous metal is known for its excellent thermal and electrical conductivity?
Which of the following coatings involve the build-up of an oxide film through chemical treatment?
Which of the following coatings involve the build-up of an oxide film through chemical treatment?
What type of coating uses a formulation based on a dissolved material that forms a transparent layer after drying?
What type of coating uses a formulation based on a dissolved material that forms a transparent layer after drying?
Which coating process is typically applied to only one side of the item and has no specific requirements for appearance, malleability, or corrosion protection?
Which coating process is typically applied to only one side of the item and has no specific requirements for appearance, malleability, or corrosion protection?
What is the principal use of a priming paint?
What is the principal use of a priming paint?
In which coating process are chromates typically used?
In which coating process are chromates typically used?
What does pretreatment priming typically involve?
What does pretreatment priming typically involve?
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Study Notes
Properties of Metals
- Age-hardening: a slow hardening process in certain alloys
- Brittleness: ability to break under a sharp blow
- Conductivity: capacity to transmit heat and electricity
- Ductility: ability to be stretched into fine wire without fracture and bent
- Elasticity: ability to regain original shape after deformation
- Fusibility: property of becoming liquid when heated
- Hardness: resistance to deformation
- Malleability: ability to be extended in all directions without fracturing by rolling, hammering, or beating
- Tenacity or cohesion: resistance to a pulling force
- Work-hardening: hardening of metal while being hammered or bent
Metal Furnishes in Furniture Production
- Metals and alloys require protective covering to prevent corrosion and tarnish
- Mechanical means of protective covering include coating, painting, enameling, lacquering, and plastic and nylon coatings
Coating Processes
- One-sided or two-sided coating: single or multiple applications of liquid or powder coating materials
- Non-metallic coatings: painting, enameling, lacquering, and plastic and nylon coatings
- Coil coatings: continuous coating applications of a metal strip
- Backing Coats: single coating of any type with no specific requirements
- Chemical conversion coatings: build-up of an oxide film through treatment of a metal with chemical solutions
- Priming: applying a priming paint, often pigmented with a corrosion inhibitor like zinc chromate
- Pretreatment priming: application of a solution containing resin, chromate, and acid
- Single Coat Systems: coatings with requirements concerning appearance, malleability, corrosion protection
Types of Metal
Ferrous Metals
- Galvanized Steel: composed of iron with a protective zinc coating on its surface
- Wrought Iron: iron with traces of silicate, easily worked and tough and ductile
- Cast Iron: iron with small amounts of carbon, silicon, sulfur, etc.
- Mild Steel: iron with up to 0.3% carbon, used in general-purpose metal
- Stainless Steel: steel with chromium and nickel, used in cutlery and furniture frames
- Tool and Alloy Steel: composition varied by addition of different elements to molten steel
- Copper-bearing Steel: has high resistance to corrosion, used in making sheet steel and metal lathe
Non-Ferrous Metals
- Aluminum: lustrous silver-white, magnetic, lightweight metal, very malleable with good thermal and electrical conductivity
- Copper: pure metal, highly ductile and malleable, used in hot water pipes and electrical parts
- Lead: pure metal, soft, malleable, and heavy, used in plumbing, flashings, and container linings
- Zinc: pure metal, used as a substitute for lead in flashings and linings, and in galvanized steel
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