2017年4月10日 · #1 copper is the second most profitable type to trade in. To be classified as #1, the copper should be comprised of bus bars, clippings, commutator segments and wire of at least 1/16th of an inch in diameter. It should also be clean in appearance, unalloyed and uncoated.

2024年6月15日 · Ratings of copper corrosion test 1A and 1B refer to the level of corrosion observed on a copper strip exposed to a specific environment. In test 1A, no corrosion is observed after a...

GB/T 5096 石油产品 铜片腐蚀试验，这是目前 工业润滑油 最主要的 腐蚀性 测定法，本方法与ASTM D130-83方法等效。 把一块已磨光好的铜片浸没在一定量的试样中，并按产品标准要求加热到指定的温度，保持一定的时间。 待试验周期结束时，取出铜片，在洗涤后与标准色板进行比较，确定腐蚀级别。 工业润滑油常用的试验条件为100℃（或120℃），3h。 1、试验铜片放入试管油样中，恒温50摄氏度+1，放置3hr+5min对照 腐蚀标准色板。 分级（1a、1b、2a、2b、2c …

The rating of 1A is given for appearance of freshly polished copper coupons with slight discoloration, but barely noticeable; 1B indicates slight tarnish, and the ratings proceed further down the scale as corrosion staining of the test coupon increases, with 4C being the worst, typically appearing as severely corroded, blackened, and pitted coupon.

TANAKA offers high-purity copper (Cu) ultra-fine wires (down to 15um) of oxygen-free copper grade as well as palladium (Pd) coated copper wire (PCC) added with oxidation resistance through precious metal coating. Costs can be reduced by approximately 90% compared to expensive gold (Au) wires.

提供無氧化物等級之高純度極細線徑銅 (Cu)鍵合線 (最小線徑15µm)。 亦提供透過貴金屬電鍍做出耐氧化性能的Pd包覆銅鍵合線 (PCC)。 與昂貴的金 (Au)鍵合線相比，有助於降低約90%的成本。 Storage Condition:130。 C 85% 本公司提供技術資料給有意索取者。 請進入以下連結填寫必要項目後索取資料。 有關本公司產品、案例更進一步的諮詢服務，歡迎由此來信。 我們24小時受理來信。 提供無氧化物等級之高純度極細線徑銅 (Cu)鍵合線 (最小線徑15µm)。 亦提供透過貴金 …

2012年1月30日 · Yes, a 1A or a 1B rating indicates a "yellow-metal friendly" transmission oil. An oil can be trusted to be "yellow-metal friendly" if it adheres to GL-4 standards. On the other hand, a GL-5 oil has to be tested to ensure that it passes the ASTM D-130 copper corrosion test if you want to use it in an older transmission.

Test Method for Copper Strip Corrosion by Liquefied Petroleum (LP) Gases, ASTM D 1838.4,5 In this test, a strip of cleaned, polished copper is suspended in a vessel that has been rinsed with water, and pressurized with an appropriate quantity of LPG. The filled vessel is then maintained at 38 °C (100 °F) for 1 h, after which the

A rating of 1A signifies the appearance of slightly discolored freshly polished copper coupons, which are scarcely noticeable. A rating of 1B implies slight tarnish, and the ratings decrease progressively down the scale as the corrosion staining of the test coupon becomes more severe.

The Sentinel Copper assay is a direct colorimetric method for the determination of copper. Instrument-specific applications are available upon request. Calibrator included. Separated multiparametric controls are available for purchase Quantite Reagent 1a: 5x20 mL Reagent 1b: 1x10 mL (tablets) Reagent 2: 1 x 21 mL Standard: 1 x 10 mL