Seal coat....

Seal coat

Seal coat: Material applied to infiltrate and close the pores of a thermal spray coating

Secondary Gas

Secondary Gas: The minor gas of the plasma arc gas combination. Typically Hydrogen or Helium.

Self Bonding materials

Self Bonding materials: Those materials that exhibit the characteristics of forming a metallurgical bond with the substrate in the as-sprayed condition.

Self-Fluxing Alloys

Self-Fluxing Alloys: Thermal spray materials that "wet" the substrate and coalesce when heated to their melting point without the addition of an external flux. These materials normally contain Boron and or Silicon as fluxing agents.

Sheraplex

Sheraplex: The Sheraplex process is a duplex system which utilises the excellent sacrificial corrosion protection afforded by the Sherardizing process combined with an Organic barrier layer. 

Sherardizing

Sherardizing : is a diffusionprocess in which articles are heated in the presence of Zinc dust.  The process is normally carried out in a slowly rotatin closed container at temperatures ranging from 320-500 degrees centigrade.

Sieve

Sieve: One of a set of sieves, designated by the size of the openings, used to classify and sort powder to particle size.

Sieve Analysis

Sieve Analysis: A method of determining particle size distribution.

Spalling

Spalling: The flaking or separation of a sprayed coating

Splat

Splat: A single thin flattened thermally sprayed particle.

Spray

Spray: A moving mass of thermal sprayed dispersed liquid droplets or heat softened particles

Spray Angle

Spray Angle: The angle of particle impingement measured from the surface of the substrate to the axis of the thermal spraying nozzle.

Spray Deposit

See Thermal Spray Deposit

Spray Distance

Spray Distance: The distance maintained between the thermal spraying gun nozzle tip and the surface of the workpiece during spraying.

Spray dried powder

Spray dried powder: Powder formed by the spray drying process.

Spray Fused Coating

Spray Fused Coating: A process in which the coating material is deposited by flame spraying and then fused into the substrate by the addition of further heat. This can be applied by flame, induction heating or by laser.

Spray rate

Spray rate: The rate at which thermal spray material passes through the thermal spray process.

Substrate

Substrate: The parent or base material to which the coating is applied.

Surface activation

Surface activation: A method of cleaning or surface roughening the substrate by a forcibly projected stream of sharp angular abrasive grit.

Surface preparation

Surface preparation: The operations necessary to produce a desired or specific surface condition.

Surfacing

Surfacing: The application by thermal spraying of a layer or layers of thermal spray materials to a surface to obtain desired properties or dimensions.

Surfacing Materials

Surfacing Materials: The materials that is applied by the thermal spray process to a substrate during surfacing

Home    Previous    Next