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In 1880, the Census of Manufacturing recorded 570 employees. Competition increased during this period, especially in LaSalle-Peru, with the arrival of Illinois Zinc Company in Peru, the Mineral Point Zinc Company in DePue, and the Collinsville Zinc Company near St. Louis. Lanyon and Company and Thomas Kinsman also ran small smelters in LaSalle.
Peru is a city in LaSalle and Bureau counties, Illinois, United States. The population was 9,896 at the 2020 census, down from 10,295 at the 2010 census.It is part of the Ottawa, IL Micropolitan Statistical Area.
The chosen content of zinc depends on the required productivity and part configuration. High zinc improves the bath's efficiency (plating speed), while lower levels improve the bath's ability to throw into low current densities. Typically, the Zn metal level varies between 20 and 50 g/L (2.7-6.7 oz/gal). The pH varies between 4.8 and 5.8 units.
Excluding the continuous strip plating industry, copper is the second most commonly-plated metal after nickel. [6] Copper electroplating offers a number of advantages over other plating processes, including low metal cost, high-conductivity and high-ductility bright finish, and high plating efficiency.
Patents relating to Galvannealed wire were obtained by the Keystone Steel and Wire Company (Peoria, Illinois, USA) c. 1923. The company used the name "Galvannealed" as a brand name. [7] The key early patent was US patent No. 1430648 (J.L. Herman, 1922, Peoria, Illinois, USA) "Process of coating and treating materials having an iron base". The ...
Chemical coloring of metals is the process of changing the color of metal surfaces with different chemical solutions. The chemical coloring of metals can be split into three types: electroplating – coating the metal surface with another metal using electrolysis. patination – chemically reacting the metal surface to form a colored oxide or ...
Before the advent of cheap mild steel, the backing metal (known as "backplate") was wrought iron. While once more widely used, the primary use of tinplate now is the manufacture of tin cans . In the tinning process, tinplate is made by rolling the steel (or formerly iron) in a rolling mill , removing any mill scale by pickling it in acid and ...
Black nickel plating was developed around 1905, and between the two wars, black chrome plating (first German patent 1929.GP 607, 420), which saw wider use only from the mid-1950s. [14] After the First World War, the first procedures for anodic oxidation and coloring of anodically oxidized aluminium were developed (1923, 1924.DRP. 413876).
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