Effect of Specific Surface Pretreatments

The nature and character of the adherend surface is extremely important to understanding the durability performances of bonded joints. In the most fundamental sense, two atomically 

Brewis, Comyn, and Phanopoulos i) have very recently made joint durability evaluations of nonextracted, water-extracted, and solvent-extracted wood adherends their results indicate that the level of surface extractions have a major influence on both strength and durability of the joints. 

There are some other factors that can influence the durability of wood joints especially in dissimilar adherend joints with metals. Wood, unfortunately, is not a homogeneous material because its chemical composition can vary depending on the soil in which it is grown. The 

The reader should bear in mind that the American Society for Testing and Materials (ASTM) has developed a number of standardized testing procedures which can be used for evaluating the long-term durability of bonded wooden structures. A partial listing of some of these can be found among the list of references at the end of this chapter. ( 2-86) 

The simplest type of surface pretreatment for aluminum or any metal is to solvent-wipe or vapor-degrease the as received metal. This will obviously remove most kinds of loosely adhering dust or dirt or other atmospheric deposits as well as organic greases, lubricants, and 

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