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Internal stress exists in electroplated and chemically applied metallic coatings. This paper reviews the test procedures for measuring deposit stress and the formulas used to calculate stress values. Many formulas used require modification to obtain actual internal stress values. Errors in this regard are examined and common mistakes are explained.

Due to their desire to reduce chromium content of their parts, a number of our customers are asking us to investigate zinc alloy plating of their parts.

If self-confidence is not the key to success, it is certainly a major ingredient.

One of the toughest jobs supervisors face is getting across to their employees that results—not only good intentions —are what really count.

The causes of and remedies for defects in hard chromium deposits are explored in the first of this two-part P&SF article from 1984.  Photomicrographs and SEM (scanning electron microscope) photo­graphs will illustrate that most defects in various hard chromium deposits arise from defects in the basis metal. These defects may be in the original metal surface or may be caused by preplate finishing. Homogeneous hard chromium deposits can be produced only by eliminating these defects. Practical suggestions and procedures will be given.

Tips to help you choose a system for profit, performance and quality.

The knowledgeable supervisor sees a gripe for what it really is—a chance to be of help to an employee when that help is most wanted, a golden opportunity to prove to a worker that his problem is management’s problem.

When increases in production require paint-system expansions, they usually also require more capacity from emissions-abatement systems...

Voluntary Protection Programs (VPP) in particular have attracted a diversified group of employers, from small mom-and-pop operations to large industrial sites. This article outlines the benefits of the VPP program and discusses specific safety concepts needed to start/develop a successful program.

The chemical polishing of artificial heart valve rings and the factors influencing surface quality were investigated in this work. The optimum parameters for polishing flat specimens were determined from a fractional factorial design and a few single-factor experiments. The results indicated that a good bright surface was obtained on the valve ring through chemical polishing in the optimum solution, and the pivot orifice surface roughness (Ra) of approximately 0.2 μm could be achieved. This result also provides a simple method to obtain a smooth surface on biomedical titanium.