10
GOOD REASONS FOR MECHANICAL GALVANIZING
1.
Excellent Adhesion and controlled uniformity of coating thickness:
Sacrificial metal coating is applied with coverage to
all surfaces of the part to the corners recesses, threaded
areas as well as to the flat, more exposed regions. Threaded
peaks especially show no build-up plating thickness. They
or other sharp points have uniform thickness you want in plating.
Because mechanical plating is so uniform, you can save money
by coating at lower average thickness. Parts weighing up to
three pound and measuring with a longest dimension up to eighteen
inches can be handled, including some that are usually rack
excessive build-up o plating on protruding points of the part
and leave other areas with thinner spot more vulnerable to
corrosion.
2.
No hydrogen embrittlement:
Because Mechanical Galvanizing is an extension of mechanical
plating technology; it does not produce hydrogen embrittlement
and does not require lengthy non-reliable post-plate baking
cycles.
3.
No detempering:
Mechanical Galvanizing is a room temperature process
that does not detemper heat-treated parts. Mechanical Galvanizing
does not fill valleys of threaded fasteners and their parts
mate quickly and easily.
4.
Eliminate retapping of units:
In hot-dip galvanizing, threads must be cut or chased
after galvanizing, robbing them of protection and requiring
extra expense. Mechanical Galvanizing produces parts that
are ready to use without any further processing steps.
5.
No Galling:
Because of the composite nature of mechanical coating,
this naturally lubricated coating will not gall, producing
more accurate torque-tension relationship.
6.
No Sticking:
In hot-dip galvanizing, molten zinc often fuses parts
together, resulting in lost time, effort and materials. By
contrast, mechanical galvanizing keeps parts functional as
delivered, eliminating the need for extra assemblies (up to
30% with hot-dip process).
7.
Excellent Corrosion Protection:
For equivalent thickness, mechanical galvanized is equal
or superior to conventional galvanizing methods.
8.
Pos-Plate Treatment:
Coating may be treated with any conventional post-plate
treatment, including inline chromating and/r waxing.
9.
Batch to batch conformity:
No time variables common with hot-dip. Thickness depends
only on the amount of zinc powder.
10.
Overall Appearance:
Overall appearance of mechanical galvanizing is superior
to the overall appearance of hot galvanizing. Appearance is
uniform comparatively smooth with a satiny texture and has
none of the discolored and mottled effect o hot-dip galvanizing.
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10
GOOD REASONS FOR MECHANICAL PLATING
1.
The most important reason for mechanical plating is the assurance
of product reliability through the elimination of hydrogen
embrittlement. Mechanical plating is he method preferred by
many engineers for hardened fasteners and stressed components.
2.
No baking needed: Plating does not require the added production
step and cost of non-reliable post plated baking, as is the
case with electroplating. Parts breakages because of hydrogen
embrittlement need not be a problem of parts are plated mechanically
and are not used for a minimum of 48 hours after plating.
3.
The Ability to plate parts, which tangle the glass impact
media used in the process, tends to prevent parts from tangling.
This mechanical plating process characteristically makes this
technology an ideal choice for plating hardened steel springs.
4.
Provide heavy-duty corrosion resistance: If an application
requires torqueing, exposure to vibration or any handling
that could rupture a finish, mechanical plating provides durable
metal coating with excellent adhesion. Even if the mechanical
plating finish is scratched, there is still galvanic protection
for the base metal. The base metal is less chemically active
s o that the coating corrodes first.
5.
The ability to plate flat parts: The media prevents flat
parts from masking one another, making sure that all surfaces
are plated. This makes mechanical plating an ideal process
for plating flat stampings and washers.
6.
Mechanical plating has the ability to plate sintered metal
parts (powder metallurgy) without costly impregnation.
7.
Deburring is a bonus: Some installations can increase stamping
runs from the same die-sets and eliminate barrel or vibratory
finishing steps in deburring. The tumbling action during plating
provides some deburring of parts and saves you money.
8.
The ability to plate zinc, cadmium, tin or lead any mixture
of these materials. One particularly notable example is 25/75
cadmium/zinc which (in an 0.5 mil coating with a yellow chromate
conversion coating) can be expected to last thousands of hours
in salt spray and be free from red rust after 5 years of environmental
exposure.
9.
Mechanical plated arts can be given post plate treatment of
dichromate dye for color-coding and phosphate for improved
paint adhesion and waxing.
10.
We, as qualified professionals, can plate low carbon steel,
cold rolled steel, high carbon heat-treated steel, various
tool steels, high strength alloys, free-mechanical steels
(including leaded steels).
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