Delamination preventing

Development of strengthening (or retrofitting) methods by the troweling or shotcreting work of polymer-modified mortar and of exfoliation (or delamination) prevention methods by use of polymer-modified paste or mortar with fiber sheets for reinforced concrete structures [69-71]... 

Kim, R.Y (1983). Prevention of free-edge delamination, in Proc. of the 28th National SAM PE Symposium, April 1983. 

Leidheiser 9l) has proposed numerous methods of attack which can be used in an attempt to prevent or minimize the corrosion-induced delamination of polymer coatings from metal substrates. All of these methods involve the control of the chemical and physical properties of the interfacial layer between the coating and the metal substrate. Three of these methods are discussed in Sections 6.3.3-6.3.5. 

In a damaged (scribed) corrosion protection system, the wet adhesion of a coating becomes the most important factor because both liquid water and corrosive species attack the interface. A water-delaminated coating layer does not provide any corrosion protection. Thus, water-insensitive adhesion of a coating to a substrate is a mandatory requirement for the prevention of corrosion-induced delamination. 

Continuous woven fiber net of x and y axes as shown in Fig. 9, is effective to reinforce and link the exterior ceramic tile installation in the in-plane direction. Chopped fiber fixed to continuous woven fiber net at the Z direction, anchors the exterior ceramic wall tile installation. If delamination and cracking are partially generated in the exterior ceramic tile installation, honeycomb shaped woven net can prevent the fall-off of tile. Fig. 8 shows typical example of section of exterior ceramic tile installation using PLCM and honeycomb shaped woven net. 

Materials flexibility has thus been achieved— albeit at the cost of introducing an internal interface within the photoreceptor structure—an interface which must be carefully controlled in the coating process to prevent undesirable intermixing of layers, delamination, and the formation of barriers impeding charge carrier injection. 

The bond coat should prevent a steep gradient in the CTE between substrate and coating that will otherwise induce large residual tensile stresses leading to cracking and delamination of the coatings. 

---