Weather Conditions

Question 1

Many Industrial coating projects are done ___ in ___ conditions.

Answer 1

Outside in Ambient Conditions.

Question 2

The vulnerability of a coating/substrate to weather presents many challenges for owners and contractors. Some of these are:

1. Job ___.
2. ___ ___ ruined.
3. Lost production time from redoing ___ ___.
4. ___ when work cannot be done.

Answer 2

1. Job delays.
2. Surface Prep ruined.
3. Lost production time from redoing Surface Prep.
4. Seasons when work cannot be done.

Question 3

___ ___ are available but add cost to the project.

Answer 3

Environmental controls.

Question 4

It is not uncommon to 1___ a bridge, high-rise tank, or even the deck of an aircraft carrier to complete a coating project in near perfect. 2. ___ ___.

Answer 4

1. Enclose.

2. Environmental Conditions.

Question 5

While enclosures seem to be the optimum answer to bad weather conditions there are drawback.

1. Enclosures may ___ against the surface.
2. CI’s may need to work in ___ spaces and need to be prepared for that.
3. Some enclosures may not have proper ___.

Answer 5

1. Enclosures may be tight against the surface.
2. CI’s may need to work in hazardous spaces and need to be prepared for that.
3. Some enclosures may not have proper lighting.

Question 6

SSPC Technology Guide No. 1___ states surface prep and coating require a minimum of 2__-___ ___ and recommends __-___ ___.

Answer 6

1. 12

2. 20-foot candles and recommends 50-foot candles.

Question 7

Candles are a measure of?

Answer 7

Light falling on a surface.

Question 8

SSPC Technology Guide No. 1___ states that inspection work requires a minimum of 2 __-___ ___ and recommends ___ ___ ___.

Answer 8

1. 12

2. 50-foot candles and recommends 200-foot candles.

Question 9

The benefits of using environmental enclosures are Control of __ and ___.

Answer 9

Temperature and humidity.

Question 10

Inspectors need to be familiar with the 1___ and observe/report 2___ ___ inside enclosures.

Answer 10

1. Equipment

2. Environmental Conditions.

Question 11

Even in enclosures, pockets of ___ or ___ ___ can occur.

Answer 11

Hot or cold air.

Question 12

Use only the type of __- and ___ equipment appropriate for coating work.

Answer 12

Heating and dehumidifying

Question 13

Some types of heating units add ___ and ___ ___ air into the enclosure.

Answer 13

Humidity and oil contaminated air.

Question 14

SSPC Technology Update No. 6
________________
SSPC Technology update No. 16

Answer 14

Guides for the design and use of enclosures.

Question 15

The majority of industrial coating undergo a ___ ___ to convert from a liquid to a solid.

Answer 15

Chemical Change.

Question 16

By the nature of chemical reactions, 1___ ___ show down chemical reactions, while 2___ ___ speed up the reaction.

Answer 16

1. Low Temps

2. High Temps.

Question 17

The temperature at which a chemical reaction stops depends on?

Answer 17

The individual product/coating and it’s components.

Question 18

A successful coating mixture is based on a delicate balance of ___ ___, a predictable ___ ___ ___, and a ___ that allows the coating to react in a consistent manner.

Answer 18

Correct mixing, a predictable solvent evaporation rate, and a temperature that allows the coating to react in a consistent manner.

Question 19

Most coatings are formulated for application at a temperature range of 1___ and ___, with a max humidity of 2___.

Answer 19

1. 41 to 122 F.

2. 85%

Question 20

Some coatings are applied underwater with a ___ ___ humidity rate.

Answer 20

100 percent.

Question 21

Exceptions to general temperature parameters include low temp coatings like 1___ ___ ___, which cures at temps as low as 2___ but requires a humidity of 3___ __ or higher.

Answer 21

1. Inorganic Zinc Silicate.
2. 32 F
3. 50 percent.

Question 22

Moisture cured polyurethanes require a minimum ___ ___.

Answer 22

Humidity level.

Question 23

Some coating manufacturers supply a special cure for their 1___ that speeds up cure at temps below 2___.

Answer 23

1. Epoxy.

2. 50 F

Question 24

Some coating manufacturers make special 1___ coatings that cure at temps 2___ ___. The low temp of the material increases 3___ so additional 4___ is needed to increase ease of application.

Answer 24

1. Epoxy
2. Freezing.
3. Viscosity
4. Thinner/heating.

Question 25

Adding thinner is not a good solution in low temp coating application. 1___ the coating is the correct solution.

Answer 25

Heating.

Question 26

Low temps also slow the curing times of ___ cured coatings. This adds to production time and can lead to other problems as well.

Answer 26

Chemically.

Question 27

1____ coatings normally cure at a 2___ ___ somewhat less than 3___.

Answer 27

1. Polyurethane
2. Minimum Temp.
3. Epoxies.

Question 28

Most solvent evaporation cure coatings are not as sensitive to 1___ ___ as 2 ___ ___ coatings.

Answer 28

1. Lower temps.

2. Chemically cured.

Question 29

___ or ___ ___ that are too high negatively affect coating application and cure.

Answer 29

Surface or air temps.

Question 30

When surface temps are too high, the solvent in solvent-borne coatings evaporates too quickly and the 1___ ___ decreases, as does the 2___ of many two component materials.

Answer 30

1. Pot life decreases,

2 Viscosity.

Question 31

High humidity slows solvent evaporation and under certain conditions will leave ____ on the coating surface.

Answer 31

Moisture.

Question 32

Moisture on coating during curing can cause problems, precisely what occurs depends on the?

Answer 32

Coating formulation.

Question 33

Some curing agents used with 1___ and ___. coating are moisture sensitive. This means that instead of reacting with the 2___ as intended, they react with the moisture on the surface. This results in 3___.

Answer 33

1. Epoxy and Polyurethane.
2. Resin.
3. Blushing.

Question 34

The minimum effect of water on a curing coating is some loss of ___ or ___.

Answer 34

Loss of Gloss or color.

Question 35

At worst, the effect of moisture on a curing coating is ___ ___ which must be removed prior to top coating.

Answer 35

Amine Blush.

Question 36

Temp and humidity of coating storage areas should be recorded for, at least, ___ ___ before the use of material.

Answer 36

24 hours.

Question 37

At minimum, record:

1. ___ ___,
2. ___ temp.
3. ___ temp.
4. ___
5. ___ __

at the beginning and end of each shift. If these do not conform to the specification, inform the project supervisor.

Answer 37

1. Ambient temp.
2. Material temp.
3. Surface temp.
4. Humidity
5. Dew Point.

Question 38

If at all possible, continue to record 1___ __ during the 2 ___ ___. This could take as long as 7 days.

Answer 38

1. Environmental Reading.

2. Curing phase.