BACKGROUND: A review of the literature showed that the core competencies needed by newly graduated Chinese nurses were not as of yet undocumented. OBJECTIVE: To develop a psychometrically sound instrument for identifying and measuring the core competencies needed by Chinese nursing baccalaureate graduates.
A&P here. Zinc chromate is used as a primer on aluminum surfaces as a conversion process to inhibit corrosion. Since nearly all modern aircraft skins and structures are made from aluminum, this compound and its derivatives are the most common primers seen in aircraft manufacturing.
An etch primer is made to be put on bare metal and provides chemical adhesion as well as mechanical. The mechanical adhesion of an etch primer works just the same as a regular primer mentioned above. The chemical adhesion is achieved by an acid contained in the primer. This acid will etch itself into the substrate.