Mechanical coating definition

The definition of an adhesion promoter in its most literal sense may be stated as any substance which when placed between two adherends results in a measurable increase in the force required to separate the two materials. This definition does not address the basic mechanism responsible for the increased adhesion nor does it concern itself with the mode by which the promoter is contacted with the adherend surface, i.e. as primer, by in situ incorporation into an adhesive or coating, or by other means. 

Until recently, it had not been established whether the association of O atoms with CO was bi- or term olecular. Althou Dixon-Lewis and Linnett [30] and Buckler and Norrish [368] considered their results to be> more consistent with a bimolecular association, Baldwin et al. [395] have pointed out that their interpretation was based on too simple a mechanism for data obtained with KCl coated vessels (see Sect. 10.1.3(6)(iii) and Fig. 68). Shock tube studies definitely indicate that the dissociation is second order at lower pressures, and this implies by microscopic reversibility that the reverse association reaction is termolecular. Kondratiev and Intezarova... 

Decortication and Separation of Fibers.—By decortication is meant the removal of a coat and since in the preparation of vegetable fibers the cortex must be removed at some stage of the operation, this term has taken on the additional definition of mechanically cleaning fibers. 

Although the term was originated to describe the failure of organic coatings, it is clear that cathodic disbondment can lead to the accelerated failure of adhesive joints as well. The work of Davis and Watts illustrates this phenomenon for steel substrates bonded with an epoxy adhesive and shows how a combination of XPS and Secondary Ion mass spectroscopy (SIMS) are able to provide a definitive picture of the locus of failure. Such a combined approach enables a detailed mechanism of failure to be postulated. 

The series of experiments allowed the definition of maximum tolerable values of the DoO depending on temperature and substrate thickness as failure criteria for Coat-Mix substrates. The limit values depend only on temperature and cell type. How the DoO is reached, in a short time with high flow or vice versa, does not play a role. For the 1.5 mm substrate first mechanical damage was... 

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