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Finishing Processes AI Flashcards

(63 cards)

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1
Q

What are paints generally used on?

A

Metal and wood

Different types of paint are required for different materials.

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2
Q

What is one of the primary functions of paint?

A

To provide a barrier against corrosion and decay

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3
Q

What are three methods of applying paint?

A
  • Brush
  • Spray
  • Roller
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4
Q

What is a disadvantage of paint related to its durability?

A

Paint can chip, peel or fade over time requiring touch ups

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5
Q

How does paint benefit metal surfaces?

A

It is a low cost way of corrosion prevention, helping to increase longevity

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6
Q

What is an advantage of using paint in terms of appearance?

A

It offers a wide variety of colours and finishes

Paint can also offer a coloured and textured finish.

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7
Q

What preparation is needed before painting surfaces?

A

Cleaning, sanding, or priming

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8
Q

What specific preparation is required for metal surfaces before painting?

A

Metals must be degreased

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9
Q

What is a limitation of paint compared to other finishing methods?

A

It is only a temporary finish

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10
Q

What factors can paint shield surfaces from?

A
  • Moisture
  • Sunlight
  • Rust
  • Wear
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11
Q

Why does paint require regular reapplication?

A

To properly maintain its function of protecting the material and keep it looking aesthetically pleasing.

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12
Q

What is a cost-related advantage of paint?

A

Generally cheaper than alternative methods of protecting wood and metals

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13
Q

What are volatile organic compounds and why are they a concern with wet paints?

A

They could be harmful without adequate ventilation

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14
Q

What is a cleaning-related disadvantage of painted surfaces?

A

Paint surfaces can often be harder to clean than other methods

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15
Q

What is one benefit of modern paints regarding drying time?

A

They dry quickly, reducing waiting time

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16
Q

Why should wood be treated where there is knotting?

A

To prevent the resin from spoiling the finish

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17
Q

What is often needed for both wood and metal before applying the final coat to give adequate protection?

A

Undercoats ( and sometimes primers are necessary)

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18
Q

What are varnishes primarily used on?

A

Wood

Varnishes are commonly applied to wood surfaces.

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19
Q

What types of finishes can varnishes be available in?

A

Gloss, satin, and matte finishes

Varnishes may come in various types of finishes to suit different aesthetic preferences.

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20
Q

What are the two types of finishes varnishes can come in?

A

Clear and coloured finishes

Varnishes can either be transparent or tinted to add color.

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21
Q

What types of finishes can varnish provide?

A

Hard, heatproof, and waterproof finish

Varnishes offer durability and protection for wood surfaces.

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22
Q

Where are varnishes often used?

A

On furniture and some outdoor products

Varnishes are suitable for both indoor and outdoor applications.

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23
Q

How should varnish be applied to wood?

A

With a brush in the direction of the grain

Proper application technique is crucial for achieving a smooth finish.

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24
Q

What is required between coats when applying varnish?

A

Sanding the wood down

Sanding between coats helps promote adhesion and achieve a better finish.

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25
List some advantages of using varnish.
* Provides a hard, tough finish * Allows the grain of the wood to be seen * Offers protection against sunlight damage * Very waterproof, especially marine or polyurethane varnishes ## Footnote These advantages make varnish a popular choice for wood finishing.
26
List some disadvantages of using varnish.
* Requires sanding between coats * Needs multiple coats and long drying time * Requires a clean smooth surface * Oil-based varnishes tend to discolour with age * Touch-ups may not blend well ## Footnote These disadvantages can complicate the varnishing process.
27
True or False: Varnish is only available in clear finishes.
False ## Footnote Varnishes can be found in both clear and coloured finishes.
28
Fill in the blank: Varnish is often used on _______.
furniture ## Footnote Varnish is particularly popular for finishing furniture surfaces.
29
What are sealants primarily used for?
Sealants are used on metals to protect polished surfaces from corrosion.
30
In which industry are sealants commonly utilized as a barrier against weathering?
Sealants are commonly used in the automotive industry.
31
What is one application of sealants on machine beds?
Sealants provide a smooth surface on machine beds.
32
How are sealants applied?
Sealants can be applied with a cloth or machined to produce a film.
33
What is the curing time for sealants?
Sealants are cured for up to 15 minutes.
34
What should be done to sealants after curing?
Sealants should be buffed with a cloth to shine.
35
True or False: Sealants can only be applied with a cloth.
False. A gun can also be used with some sealants like silicone.
36
List three advantages of using sealants.
* Increases the toughness of the surface * Prevents water, moisture, and air from seeping through surfaces * Shields materials from weather chemicals and physical damage
37
What is a disadvantage of sealants concerning their strength?
Sealants often have limited strength as they are not meant to bear heavy loads.
38
What conditions must surfaces meet for proper adhesion of sealants?
Surfaces must be clean, dry, and often primed.
39
What environmental factors can affect sealants after application?
UV light, temperature extremes, or chemical exposure can cause issues.
40
Fill-in-the-blank: Sealants can look very _______ if not applied properly.
messy
41
What can happen to sealants once they are set?
Once set, sealants can be very tough to remove or replace neatly.
42
True or False: Many sealants remain flexible after drying.
True. Many sealants, like silicone, stay flexible even after drying.
43
What are preservatives used for?
To provide medium to long term protection for metal surfaces
44
What additional applications do preservatives have aside from protecting metals?
Preventing fingerprints, minor atmospheric corrosion, or condensation build up on moulds and dies
45
In what forms can preservatives be applied?
Coatings like oils or treatments
46
How can preservatives be applied to surfaces?
By wiping on with a cloth, spray or immersion of the product
47
List some advantages of using preservatives.
* Easy to apply with little specialist tooling * Prevent rust, oxidation, or chemical damage * Increase surface life of metal parts * Maintain strength and appearance over time * Reduce need for frequent replacements and repairs * Cost efficient over time
48
What are some disadvantages of using preservatives?
* Some coatings wear off and need reapplication * Surface preparation often required * Some chemical preservatives can be toxic * May break down in harsh environments * Initial treatment and maintenance can increase costs
49
True or False: Most preservatives require specialist tools for application.
False
50
Fill in the blank: Preservatives can help maintain the _______ and _______ of metals over time.
[strength], [appearance]
51
What can happen to preservatives in extremely harsh environments?
They may eventually break down without heavy-duty options
52
What is electro-plating generally used for?
It is used on metals to provide a protective layer and enhance aesthetics.
53
Name some metals commonly used for electro-plating.
* Silver * Gold * Zinc * Copper * Tin
54
What is required to electro-plate some metals?
The product and donor material should be placed in a container with electrolyte solution.
55
What happens when direct current is applied during electro-plating?
The product attracts the donor metal and gets electroplated.
56
List some advantages of electro-plating.
* Can be used on low-cost metals * Makes surfaces more hardwearing * Provides color to metal * Protects from rust and oxidation * Adds a smooth, shiny finish * Improves electrical conductivity * Thin layer of expensive metal on cheaper metals
57
What are some disadvantages of electro-plating?
* Requires a container with electrolyte solution and electric current * Needs specialist equipment and skilled labor * Uneven coatings can lead to weak spots * Slow process to build thick layers * Hazardous chemicals involved * Maintenance needed for tarnishing or peeling
58
True or False: Electro-plating can improve the electrical conductivity of parts.
True
59
Fill in the blank: Electro-plating requires _______ to create the coating.
[an electric current]
60
What can uneven coatings in electro-plating lead to?
Weak spots or functional problems.
61
What is a potential issue with the maintenance of electro-plated surfaces?
Some plated surfaces can still tarnish, chip, or peel over time.
62
What type of finish can electro-plating add to products like jewelry?
A smooth, shiny, and decorative finish.
63
What is a key factor in the initial setup cost for electro-plating?
The need for specialist equipment and skilled labor.

DTE (6 decks)

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