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Wood Seasoning & Preservation - Coggle Diagram
Wood Seasoning & Preservation
wood preservation
terms
science of protecting wood
destructive agents
treatment of wood
chem subs - toxic action
importance
increase life span & service ability
nature of wood
favorable condition
susceptible to attack
agencies of wood deterioration
decay fungi
low form of plant
lack chlorophyll
types
brown rot
white rot
soft rot
stain & mold
wood boring insects
termites, beetles, ants, bees, wasps, moths, etc
marine borers
group of invertebreates
burrow & attack
marine waters
moluscan borers
shipworm
pholads
chemicals
oil preservatives
complex mixtures of organic materials
aromatic hydrocarbons
natural materials
oil borne preservatives
solvent based
volatile non polar organic solvent
water borne preservatives
toxic metallic salts or oxides
preparation of wood before treatment
debarking 1
drying 2
incising 3
machining 4
preservative treatment processes
non pressure processes
types
spraying
large areas
inaccessible timber w/ hoels
brushing
small items/timber
dipping
immersion in preservative for a short period of time
soaking
immersion in several hours or days
hot & cold bath
thermal process
treatment for green wood
diffusion
gradual movement of water soluble borates
sap displacement
pressure processes
types
full cell process
empty cell process
non bio agents of deterioration
weathering
photo degradation
uv light
thermal decomposition
decomposition at elevated temp
result
color changes
reduction in hygroscipity
mechanical wear
abrasive action
rupture & detach small portion of wood surface
wood seasoning
removing excess moisture from the wood
types
air seasoning
kiln drying
seasoning defects
rupture of wod tissue
warp
uneven mc
discoloration