Box 40 | Imperial, PA 15126 | 724-695-2212 | 724-695-2218 (fax) |
along with sophisticated analytical and physical
testing equipment, has brought Weldon Laboratories a
reputation as one of the nation’s premier paint
and coatings testing laboratories.
Analysis Capabilities Include:
Microscopy. Light microscopy using a stereo
microscope is an invaluable tool for examining
both small and large samples. It is almost
always the first step in a laboratory failure
Microscopy – Energy Dispersive X-ray
Spectroscopy. SEM-EDS employs a powerful
electron microscope equipped with an x-ray
detector. The combination allows very high
magnification, along with simultaneous
multi-element analysis. It could be used to
identify certain pigments, to characterize
corrosion products, to detect salts or other
inorganic contaminates, or to determine the
plane of failure in an adhesion failure.
Transform Infrared Spectroscopy. Samples will
absorb infrared light in various fashions
depending on their chemical composition. The
resulting infrared spectrum can be used to
identify the type of paint, to determine the mix
ratio for certain types of two component paints,
and to detect such things as degree of cure,
contamination, pigment type, batching
variations, and even some types of chemical
The infrared spectrum of this sample clearly identifies it as an epoxy.
Chromatography-Mass Spectroscopy. GC-MS is used
to identify (and in some cases quantify) the
various solvents in a thinner or liquid paint
sample, and to detect solvents present in the
liquid trapped within failing, blistered
coating. It can even identify residual solvents
in dried samples to determine if an
un-authorized thinner was used.
GC-MS. With a pyrolysis attachment, the power of
GC-MS can be used to obtain compositional
information on resins, additives, and other
non-volatile ingredients of paints and coatings.
Scanning Calorimetry. DSC is used to analyze
dried paint samples for thermal events such as
chemical reactions, melting points, and glass
transition temperatures. It is primarily used to
determine the relative degree of cure of samples
which are not amenable to such analysis by
Wet Bench Facilities. Weldon Laboratories is equipped to do various wet bench chemical test methods, such as density, % solids by weight or volume, %pigment, viscosity, VOC, and numerous other tests.
microscope is an invaluable tool in examining paint
chips for number and thickness of coats.
Testing Capabilities Include:
Salt fog (ASTM B117).
Alternating QUV/Cyclic Salt Fog (ASTM D5894, “Prohesion”).
Accelerated Weathering (QUV, Xenon Arc).
Abrasion Resistance (ASTM D4060).
Impact Resistance (ASTM D2794)
Adhesion (ASTM D3359, D4541).
Hiding Power (ASTM D2805).
Flexibility (ASTM D522).
Hardness (ASTM D3363, D2240).
Sag Resistance (ASTM D4400).
Humidity Resistance (ASTM D2247, D4585).
Atlas Cell for Chemical Resistance (NACE TM-01-74).
Chemical/Immersion Testing (ASTM D1308).
Water Vapor Permeability (ASTM D1653).
ASTM G154 QUV chamber uses a combination of heat,
moisture, and ultraviolet light to accelerate the
natural weathering of coatings.
Weldon Laboratories maintans a variety of weathering and corrosion cabinets.